CC-309 Full Band Detector with LED Screen Display, Detection Frequency Range: 1MHz-6500MHz This product uses the active laser scanning and passive scanning method of combining wireless, can accurately identify: eavesdropping devices, tracking devices, car eavesdropping, wireless pinhole camera, wired camera, electrical sources, and so onCan effectively prevent eavesdropping 'videotaping, fraud and protect personal privacy data and information confidential. With automatic detection, the host to carry, at risk when there is eavesdropping devices, pinhole cameras, casino ye lie. Host will prompt your body automatically detects the danger. Has a signal strength indicator, to quickly find the source of the signal The sensitivity adjustment potentiometer can be adjusted (increased sensitivity to widen the detection range or lower sensitivity to shorten the detection range) radio power at faster to find. Detection modes: a laser probe 2 vibration (silent) 3 beep detection probe detection 4.LED display 5. Headphone mute detection.