diff --git a/app.py b/app.py
index 84cb522..3b6e1ee 100644
--- a/app.py
+++ b/app.py
@@ -347,6 +347,22 @@ def get_devices() -> Response:
     return jsonify([d.to_dict() for d in devices])
 
 
+@app.route('/devices/status')
+def get_devices_status() -> Response:
+    """Get all SDR devices with usage status."""
+    devices = SDRFactory.detect_devices()
+    registry = get_sdr_device_status()
+
+    result = []
+    for device in devices:
+        d = device.to_dict()
+        d['in_use'] = device.index in registry
+        d['used_by'] = registry.get(device.index)
+        result.append(d)
+
+    return jsonify(result)
+
+
 @app.route('/devices/debug')
 def get_devices_debug() -> Response:
     """Get detailed SDR device detection diagnostics."""
diff --git a/static/css/adsb_dashboard.css b/static/css/adsb_dashboard.css
index 22ccd18..9afac6f 100644
--- a/static/css/adsb_dashboard.css
+++ b/static/css/adsb_dashboard.css
@@ -814,6 +814,24 @@ body {
     color: var(--accent-green);
 }
 
+/* Bias-T toggle styling */
+.bias-t-label {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    padding: 3px 8px;
+    background: linear-gradient(90deg, rgba(255, 100, 0, 0.15), rgba(255, 100, 0, 0.05));
+    border: 1px solid var(--accent-orange, #ff6400);
+    border-radius: 4px;
+    color: var(--accent-orange, #ff6400);
+    font-weight: 500;
+    font-size: 10px;
+}
+
+.bias-t-label input[type="checkbox"] {
+    accent-color: var(--accent-orange, #ff6400);
+}
+
 .control-group.airband-group {
     background: rgba(245, 158, 11, 0.05);
     border-color: rgba(245, 158, 11, 0.2);
diff --git a/templates/adsb_dashboard.html b/templates/adsb_dashboard.html
index 725e3ca..639e140 100644
--- a/templates/adsb_dashboard.html
+++ b/templates/adsb_dashboard.html
@@ -17,15 +17,15 @@
     {% else %}
     <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
     <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
-    {% endif %}
-    <link rel="stylesheet" href="{{ url_for('static', filename='css/responsive.css') }}">
-    <link rel="stylesheet" href="{{ url_for('static', filename='css/adsb_dashboard.css') }}">
-    <script>
-        window.INTERCEPT_SHARED_OBSERVER_LOCATION = {{ shared_observer_location | tojson }};
-        window.INTERCEPT_ADSB_AUTO_START = {{ adsb_auto_start | tojson }};
-    </script>
-    <script src="{{ url_for('static', filename='js/core/observer-location.js') }}"></script>
-</head>
+    {% endif %}
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/responsive.css') }}">
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/adsb_dashboard.css') }}">
+    <script>
+        window.INTERCEPT_SHARED_OBSERVER_LOCATION = {{ shared_observer_location | tojson }};
+        window.INTERCEPT_ADSB_AUTO_START = {{ adsb_auto_start | tojson }};
+    </script>
+    <script src="{{ url_for('static', filename='js/core/observer-location.js') }}"></script>
+</head>
 <body>
     <div class="radar-bg"></div>
     <div class="scanline"></div>
@@ -269,6 +269,7 @@
                     <select id="adsbDeviceSelect" title="SDR device for ADS-B (1090 MHz)">
                         <option value="0">SDR 0</option>
                     </select>
+                    <label class="bias-t-label" title="Enable Bias-T power for external LNA/preamp"><input type="checkbox" id="adsbBiasT" onchange="saveAdsbBiasTSetting()"> Bias-T</label>
                     <button class="start-btn" id="startBtn" onclick="toggleTracking()">START</button>
                 </div>
             </div>
@@ -322,10 +323,23 @@
 
     <script>
         // ============================================
-        // BIAS-T HELPER (reads from main dashboard localStorage)
+        // BIAS-T HELPER
         // ============================================
         function getBiasTEnabled() {
-            return localStorage.getItem('biasTEnabled') === 'true';
+            return document.getElementById('adsbBiasT')?.checked || false;
+        }
+
+        function saveAdsbBiasTSetting() {
+            const enabled = document.getElementById('adsbBiasT')?.checked || false;
+            localStorage.setItem('adsbBiasTEnabled', enabled);
+        }
+
+        function loadAdsbBiasTSetting() {
+            const saved = localStorage.getItem('adsbBiasTEnabled');
+            if (saved === 'true') {
+                const checkbox = document.getElementById('adsbBiasT');
+                if (checkbox) checkbox.checked = true;
+            }
         }
 
         // ============================================
@@ -522,19 +536,19 @@
         }
 
         // Observer location and range rings (load from localStorage or default to London)
-        let observerLocation = (function() {
-            if (window.ObserverLocation && ObserverLocation.getForModule) {
-                return ObserverLocation.getForModule('observerLocation');
-            }
-            const saved = localStorage.getItem('observerLocation');
-            if (saved) {
-                try {
-                    const parsed = JSON.parse(saved);
-                    if (parsed.lat && parsed.lon) return parsed;
-                } catch (e) {}
-            }
-            return { lat: 51.5074, lon: -0.1278 };
-        })();
+        let observerLocation = (function() {
+            if (window.ObserverLocation && ObserverLocation.getForModule) {
+                return ObserverLocation.getForModule('observerLocation');
+            }
+            const saved = localStorage.getItem('observerLocation');
+            if (saved) {
+                try {
+                    const parsed = JSON.parse(saved);
+                    if (parsed.lat && parsed.lon) return parsed;
+                } catch (e) {}
+            }
+            return { lat: 51.5074, lon: -0.1278 };
+        })();
         let rangeRingsLayer = null;
         let observerMarker = null;
 
@@ -1810,12 +1824,12 @@ ACARS: ${r.statistics.acarsMessages} messages`;
                 observerLocation.lat = lat;
                 observerLocation.lon = lon;
 
-                // Save to localStorage for persistence
-                if (window.ObserverLocation) {
-                    ObserverLocation.setForModule('observerLocation', observerLocation);
-                } else {
-                    localStorage.setItem('observerLocation', JSON.stringify(observerLocation));
-                }
+                // Save to localStorage for persistence
+                if (window.ObserverLocation) {
+                    ObserverLocation.setForModule('observerLocation', observerLocation);
+                } else {
+                    localStorage.setItem('observerLocation', JSON.stringify(observerLocation));
+                }
 
                 if (radarMap) {
                     radarMap.setView([lat, lon], radarMap.getZoom());
@@ -1842,12 +1856,12 @@ ACARS: ${r.statistics.acarsMessages} messages`;
                     observerLocation.lat = position.coords.latitude;
                     observerLocation.lon = position.coords.longitude;
 
-                    // Save to localStorage for persistence
-                    if (window.ObserverLocation) {
-                        ObserverLocation.setForModule('observerLocation', observerLocation);
-                    } else {
-                        localStorage.setItem('observerLocation', JSON.stringify(observerLocation));
-                    }
+                    // Save to localStorage for persistence
+                    if (window.ObserverLocation) {
+                        ObserverLocation.setForModule('observerLocation', observerLocation);
+                    } else {
+                        localStorage.setItem('observerLocation', JSON.stringify(observerLocation));
+                    }
 
                     document.getElementById('obsLat').value = observerLocation.lat.toFixed(4);
                     document.getElementById('obsLon').value = observerLocation.lon.toFixed(4);
@@ -1936,17 +1950,17 @@ ACARS: ${r.statistics.acarsMessages} messages`;
             }
         });
 
-        function updateLocationFromGps(position) {
-            observerLocation.lat = position.latitude;
-            observerLocation.lon = position.longitude;
-            document.getElementById('obsLat').value = position.latitude.toFixed(4);
-            document.getElementById('obsLon').value = position.longitude.toFixed(4);
-            if (window.ObserverLocation && ObserverLocation.isSharedEnabled()) {
-                ObserverLocation.setShared({ lat: position.latitude, lon: position.longitude });
-            }
-
-            // Center map on GPS location (on first fix)
-            if (radarMap && !radarMap._gpsInitialized) {
+        function updateLocationFromGps(position) {
+            observerLocation.lat = position.latitude;
+            observerLocation.lon = position.longitude;
+            document.getElementById('obsLat').value = position.latitude.toFixed(4);
+            document.getElementById('obsLon').value = position.longitude.toFixed(4);
+            if (window.ObserverLocation && ObserverLocation.isSharedEnabled()) {
+                ObserverLocation.setShared({ lat: position.latitude, lon: position.longitude });
+            }
+
+            // Center map on GPS location (on first fix)
+            if (radarMap && !radarMap._gpsInitialized) {
                 radarMap.setView([position.latitude, position.longitude], radarMap.getZoom());
                 radarMap._gpsInitialized = true;
                 // Draw range rings immediately after centering
@@ -2008,6 +2022,9 @@ ACARS: ${r.statistics.acarsMessages} messages`;
             const detectionToggle = document.getElementById('detectionSoundToggle');
             if (detectionToggle) detectionToggle.checked = detectionSoundEnabled;
 
+            // Load Bias-T setting from localStorage
+            loadAdsbBiasTSetting();
+
             initMap();
             initDeviceSelectors();
             updateClock();
@@ -2046,27 +2063,18 @@ ACARS: ${r.statistics.acarsMessages} messages`;
                     } else {
                         devices.forEach((dev, i) => {
                             const idx = dev.index !== undefined ? dev.index : i;
-
-                            // Build descriptive label
-                            const type = dev.sdr_type || dev.driver || 'RTL-SDR';
-                            const typeName = type.toUpperCase().replace('RTLSDR', 'RTL-SDR');
-                            const shortSerial = dev.serial ? ` (${dev.serial.slice(-4)})` : '';
-                            const displayName = `${typeName} #${idx}${shortSerial}`;
-                            const fullName = dev.name || `${typeName} Device ${idx}`;
-                            const tooltip = `${fullName}${dev.serial ? ' - Serial: ' + dev.serial : ''}`;
+                            const displayName = `SDR ${idx}: ${dev.name}`;
 
                             // Add to ADS-B selector
                             const adsbOpt = document.createElement('option');
                             adsbOpt.value = idx;
                             adsbOpt.textContent = displayName;
-                            adsbOpt.title = tooltip;
                             adsbSelect.appendChild(adsbOpt);
 
                             // Add to Airband selector
                             const airbandOpt = document.createElement('option');
                             airbandOpt.value = idx;
                             airbandOpt.textContent = displayName;
-                            airbandOpt.title = tooltip;
                             airbandSelect.appendChild(airbandOpt);
                         });
 
@@ -2542,32 +2550,32 @@ sudo make install</code>
             }
         }
 
-        async function syncTrackingStatus() {
-            // This function checks LOCAL tracking status on page load
-            // For local mode: auto-start if session is already running OR SDR is available
-            // For agent mode: don't auto-start (user controls agent tracking)
-
-            const useAgent = typeof adsbCurrentAgent !== 'undefined' && adsbCurrentAgent !== 'local';
-            if (useAgent) {
-                console.log('[ADS-B] Agent mode on page load - not auto-starting local');
-                return;
-            }
-
-            try {
-                const response = await fetch('/adsb/session');
-                if (!response.ok) {
-                    // No session info - only auto-start if enabled
-                    if (window.INTERCEPT_ADSB_AUTO_START) {
-                        console.log('[ADS-B] No session found, attempting auto-start...');
-                        await tryAutoStartLocal();
-                    } else {
-                        console.log('[ADS-B] No session found; auto-start disabled');
-                    }
-                    return;
-                }
-                const data = await response.json();
-
-                if (data.tracking_active) {
+        async function syncTrackingStatus() {
+            // This function checks LOCAL tracking status on page load
+            // For local mode: auto-start if session is already running OR SDR is available
+            // For agent mode: don't auto-start (user controls agent tracking)
+
+            const useAgent = typeof adsbCurrentAgent !== 'undefined' && adsbCurrentAgent !== 'local';
+            if (useAgent) {
+                console.log('[ADS-B] Agent mode on page load - not auto-starting local');
+                return;
+            }
+
+            try {
+                const response = await fetch('/adsb/session');
+                if (!response.ok) {
+                    // No session info - only auto-start if enabled
+                    if (window.INTERCEPT_ADSB_AUTO_START) {
+                        console.log('[ADS-B] No session found, attempting auto-start...');
+                        await tryAutoStartLocal();
+                    } else {
+                        console.log('[ADS-B] No session found; auto-start disabled');
+                    }
+                    return;
+                }
+                const data = await response.json();
+
+                if (data.tracking_active) {
                     // Session is running - auto-connect to stream
                     console.log('[ADS-B] Local session already active - auto-connecting to stream');
 
@@ -2603,24 +2611,24 @@ sudo make install</code>
                     document.getElementById('trackingDot').classList.add('active');
                     const statusEl = document.getElementById('trackingStatus');
                     statusEl.textContent = 'TRACKING';
-                } else {
-                    // Session not active - only auto-start if enabled
-                    if (window.INTERCEPT_ADSB_AUTO_START) {
-                        console.log('[ADS-B] No active session, attempting auto-start...');
-                        await tryAutoStartLocal();
-                    } else {
-                        console.log('[ADS-B] No active session; auto-start disabled');
-                    }
-                }
-
-            } catch (err) {
-                console.warn('[ADS-B] Failed to sync tracking status:', err);
-                // Try auto-start only if enabled
-                if (window.INTERCEPT_ADSB_AUTO_START) {
-                    await tryAutoStartLocal();
-                }
-            }
-        }
+                } else {
+                    // Session not active - only auto-start if enabled
+                    if (window.INTERCEPT_ADSB_AUTO_START) {
+                        console.log('[ADS-B] No active session, attempting auto-start...');
+                        await tryAutoStartLocal();
+                    } else {
+                        console.log('[ADS-B] No active session; auto-start disabled');
+                    }
+                }
+
+            } catch (err) {
+                console.warn('[ADS-B] Failed to sync tracking status:', err);
+                // Try auto-start only if enabled
+                if (window.INTERCEPT_ADSB_AUTO_START) {
+                    await tryAutoStartLocal();
+                }
+            }
+        }
 
         async function tryAutoStartLocal() {
             // Try to auto-start local ADS-B tracking if SDR is available
@@ -4004,7 +4012,7 @@ sudo make install</code>
                         devices.forEach((d, i) => {
                             const opt = document.createElement('option');
                             opt.value = d.index || i;
-                            opt.textContent = `Device ${d.index || i}: ${d.name || d.type || 'SDR'}`;
+                            opt.textContent = `SDR ${d.index || i}: ${d.name || d.type || 'SDR'}`;
                             select.appendChild(opt);
                         });
                         // Default to device 1 if available (device 0 likely used for ADS-B)
@@ -4774,7 +4782,7 @@ sudo make install</code>
                     devices.forEach(device => {
                         const opt = document.createElement('option');
                         opt.value = device.index;
-                        opt.textContent = `Device ${device.index}: ${device.name || device.type || 'SDR'}`;
+                        opt.textContent = `SDR ${device.index}: ${device.name || device.type || 'SDR'}`;
                         select.appendChild(opt);
                     });
                 }
diff --git a/templates/adsb_history.html b/templates/adsb_history.html
index fa512f1..c9b0e6c 100644
--- a/templates/adsb_history.html
+++ b/templates/adsb_history.html
@@ -558,11 +558,9 @@
             }
             devices.forEach((dev, idx) => {
                 const index = dev.index !== undefined ? dev.index : idx;
-                const type = (dev.sdr_type || dev.driver || 'RTL-SDR').toUpperCase();
-                const serial = dev.serial ? ` (${dev.serial.slice(-4)})` : '';
                 const opt = document.createElement('option');
                 opt.value = index;
-                opt.textContent = `${type} #${index}${serial}`;
+                opt.textContent = `SDR ${index}: ${dev.name}`;
                 sessionDeviceSelect.appendChild(opt);
             });
             sessionDeviceSelect.disabled = false;
diff --git a/templates/index.html b/templates/index.html
index 512fec3..d5bb67f 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -537,6 +537,14 @@
                         Refresh Devices
                     </button>
 
+                    <!-- SDR Device Status -->
+                    <div id="sdrStatusPanel" style="margin-top: 10px; border: 1px solid var(--border-color); border-radius: 4px;">
+                        <div id="sdrStatusList" style="max-height: 150px; overflow-y: auto;"></div>
+                        <div style="padding: 6px 8px; background: var(--bg-tertiary); border-top: 1px solid var(--border-color); font-size: 10px; color: #666;">
+                            Auto-refreshes every 5s
+                        </div>
+                    </div>
+
                     <!-- Remote SDR (rtl_tcp) -->
                     <div class="form-group" style="margin-top: 10px;">
                         <label class="inline-checkbox">
@@ -2445,6 +2453,9 @@
 
             // Initialize dropdown nav active state
             updateDropdownActiveState();
+
+            // Start SDR device status polling
+            startSdrStatusPolling();
         });
 
         // Toggle section collapse
@@ -3717,6 +3728,9 @@
 
                     // Trigger filter update
                     onSDRTypeChanged();
+
+                    // Also refresh SDR status panel
+                    fetchSdrStatus();
                 })
                 .catch(err => {
                     console.error('Failed to refresh devices:', err);
@@ -3725,6 +3739,71 @@
                 });
         }
 
+        // SDR Device Status Panel
+        let sdrStatusPollingInterval = null;
+
+        function renderSdrStatus(devices) {
+            const container = document.getElementById('sdrStatusList');
+            if (!container) return;
+
+            if (!devices || devices.length === 0) {
+                container.innerHTML = '<div style="padding: 8px; color: #888; font-size: 11px; text-align: center;">No SDR devices detected</div>';
+                return;
+            }
+
+            const html = devices.map(d => {
+                const isActive = d.in_use;
+                const statusDot = isActive
+                    ? '<span style="display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #00ff88; box-shadow: 0 0 6px #00ff88; margin-right: 6px;"></span>'
+                    : '<span style="display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #555; margin-right: 6px;"></span>';
+                const modeName = d.used_by ? d.used_by.toUpperCase() : 'IDLE';
+                const modeColor = isActive ? '#00ff88' : '#666';
+                const sdrType = (d.sdr_type || 'RTL').toUpperCase().replace('RTLSDR', 'RTL');
+
+                return `<div style="display: flex; align-items: center; justify-content: space-between; padding: 6px 8px; border-bottom: 1px solid var(--border-color);">
+                    <div style="display: flex; align-items: center;">
+                        ${statusDot}
+                        <span style="font-size: 11px;">#${d.index} ${d.name || 'Unknown'}</span>
+                    </div>
+                    <div style="display: flex; align-items: center; gap: 6px;">
+                        <span style="font-size: 10px; color: ${modeColor}; font-weight: bold;">${modeName}</span>
+                        <span style="font-size: 9px; padding: 1px 4px; background: var(--bg-tertiary); border-radius: 3px; color: #888;">${sdrType}</span>
+                    </div>
+                </div>`;
+            }).join('');
+
+            container.innerHTML = html;
+        }
+
+        function fetchSdrStatus() {
+            fetch('/devices/status')
+                .then(r => r.json())
+                .then(devices => {
+                    renderSdrStatus(devices);
+                })
+                .catch(err => {
+                    console.error('Failed to fetch SDR status:', err);
+                    const container = document.getElementById('sdrStatusList');
+                    if (container) {
+                        container.innerHTML = '<div style="padding: 8px; color: #ff6666; font-size: 11px; text-align: center;">Error loading status</div>';
+                    }
+                });
+        }
+
+        function startSdrStatusPolling() {
+            // Initial fetch
+            fetchSdrStatus();
+            // Poll every 5 seconds
+            sdrStatusPollingInterval = setInterval(fetchSdrStatus, 5000);
+        }
+
+        function stopSdrStatusPolling() {
+            if (sdrStatusPollingInterval) {
+                clearInterval(sdrStatusPollingInterval);
+                sdrStatusPollingInterval = null;
+            }
+        }
+
         function getSelectedDevice() {
             return document.getElementById('deviceSelect').value;
         }
diff --git a/utils/sdr/rtlsdr.py b/utils/sdr/rtlsdr.py
index b5d8451..6d2b8d8 100644
--- a/utils/sdr/rtlsdr.py
+++ b/utils/sdr/rtlsdr.py
@@ -7,11 +7,44 @@ with existing RTL-SDR installations. No SoapySDR dependency required.
 
 from __future__ import annotations
 
+import logging
+import subprocess
 from typing import Optional
 
 from .base import CommandBuilder, SDRCapabilities, SDRDevice, SDRType
 from utils.dependencies import get_tool_path
 
+logger = logging.getLogger('intercept.sdr.rtlsdr')
+
+
+def _get_dump1090_bias_t_flag(dump1090_path: str) -> Optional[str]:
+    """Detect the correct bias-t flag for the installed dump1090 variant.
+
+    Different dump1090 forks use different flags:
+    - dump1090-fa, readsb: --enable-biast (no hyphen before 't')
+    - dump1090-mutability, original dump1090: no bias-t support
+
+    Returns the correct flag string or None if bias-t is not supported.
+    """
+    try:
+        result = subprocess.run(
+            [dump1090_path, '--help'],
+            capture_output=True,
+            text=True,
+            timeout=5
+        )
+        help_text = result.stdout + result.stderr
+
+        # Check for dump1090-fa/readsb style flag (no hyphen)
+        if '--enable-biast' in help_text:
+            return '--enable-biast'
+
+        # No bias-t support found
+        return None
+    except Exception as e:
+        logger.warning(f"Could not detect dump1090 bias-t support: {e}")
+        return None
+
 
 class RTLSDRCommandBuilder(CommandBuilder):
     """RTL-SDR command builder using native rtl_* tools."""
@@ -113,7 +146,14 @@ class RTLSDRCommandBuilder(CommandBuilder):
             cmd.extend(['--gain', str(int(gain))])
 
         if bias_t:
-            cmd.extend(['--enable-bias-t'])
+            bias_t_flag = _get_dump1090_bias_t_flag(dump1090_path)
+            if bias_t_flag:
+                cmd.append(bias_t_flag)
+            else:
+                logger.warning(
+                    f"Bias-t requested but {dump1090_path} does not support it. "
+                    "Consider using dump1090-fa or readsb for bias-t support."
+                )
 
         return cmd
 
