Radio Frequency Response 10MHz ~ 8GHz Telesecurity - Audio Frequency Range: 250Hz ~ 5KHz Detects Wireless tapping even with VOX Hidden cameras, Hardwired and Wireless Wire telephone tapping even on cable Computer and Fax transmitters Series and Parallel transmitters Transmitting GPS trackers (only when GPS device is transmitting signal location) Devices on internet phone and IP phone Laser Tapping Prevents Wire telephone tapping Laser tapping Recordings of a voice recorder, tape, digital and parabolic reflector using white noise generator