... A: Detection Cameras:1) Open the power switch, power indicator light(Blue light)2) Click the laser switch, instrument back 6 LED light starts ... device, etc.)Sound detection:1) Turn the power switch to the middle position, the power indicator light(Blue light)2) Move around, ... used.Silent Detection(Vibration detection)1) The power switch is pushed to the top of the power indicator light(blue light)2) A ...