Features: Equipped with 8 infrared LEDs, delivers more light to improve the reflection, bright enough for you to spot a bug or camera lens, no matter if it is plugged in. Vibration alarm can detect any subtle vibrations and send out audible alarm for anti-theft, take it with you for security check on a vacation or business trip. Easy to use, press the button, holding the finder close to your eye with the LEDs pointed away from you, and use the detector to sweep your room slowly, any bugs or camera lens will be reflected. Enter ultrasonic mosquito repelling mode, and the unit emits a sound wave that mosquitoes can\'s stand to stay them away. Protects you from the annoying mosquito bite when camping. Built-in rechargeable lithium battery enables the detector to work for about 24 hours of anti camera mode, or about 72 hours of vibration monitoring, and it can be charged by any USB devices.