YXGOOD Laser Lens GSM Device FinderUS New Anti-Spy Signal Bug RF Detector Hidden Camera 1.Detect that if your car or office is stuffed with wireless wiretap or surveillance devices. 2.Detect if the cell phone is wiretapped or is abnormal ( transmit signals without any reason at standby). 3.Detect if your car is stuffed with GPS tracking wiretap or GPS tracker. 4.Detect if there is radiation of roof base stations in your working environment or residential buildings. 5.Detect receiving and transmitting signals of short message service, signals of surfing the internet with cell phones, signals of cell phone opening, closing and calls.