VS-L7W Multi use RF Bug Detector+ Audio Signal Verification+ Lens Finder + Expert 3G 2100 Detection Features: 1.Power-On Self-Test 2.Unique Acoustic Display 3.No interference with radio station 4.8-LED signal strength indication 5.Clear indication of setting, signal type & battery status. 6.Warning Modes: Vibration & Beep (Default) & Acoustic: Identification for audio signal 7.Auto Indication of [...]