This Anti-Spy Detector is designed on the theory of wide range multiple band RF power detecting. It detects out RF, GSM device, wireless pinhole cameras and mini wireless bugs within 10m. Effectively prevents you from being shot by candid cameras or heard by hidden bugs. Ensures your absolute privacy. https://www.zapals.com/multifunctional-detector-full-range-all-round-for-hidden-camera-ip-lens-gms-bug-rf-signal-detector-finder.html