The RFD-11 is a universal counter surveillance camera lens and bug detector. RFD-11 wide band frequency camera lens bug detector can detect frequency from 50Mhz to 6Ghz. RFD-11 detector not only can detect hidden GPS trackers , b ing transmitting devices, as well as, Cell Phone 2G/3G/4G, Bluetooth and Wi-Fi ,but also can detect all types of wired and wireless cameras by RFD-11 Lens finder.