[Multi-function detector] This product uses advanced wireless sweep frequency technology and magnetic field detection technology as well as infrared reflection and laser detection technology, 6-level sensitivity is adjustable, detection frequency of 1MHZ~10GHZ RF signal, not easy to be interfered with. effectively prevent eavesdropping and candid photography, protect our personal privacy and security, so that our free flight life is more secure. [Wireless device detection mode]: The device moves slowly to detect wireless eavesdropping and stealing devices. When the signal light blinks and there is an audible prompt, it indicates that the emission source is detected. The brighter the signal indicator, the stronger the transmitting source signal. Detection sensitivity adjustment: Press the up key to adjust the detection signal sensitivity. The more signal indicators, the higher the detection sensitivity.