Counter Surveillance Detection Kits, you’ll never have to worry about someone listening in on a private conversation or watching you without your permission again. Portable and easy to carry on-the-go, this kit comes with the unique ability to detect hidden cameras, listening devices, or GPS trackers that could be invading your private home, vehicle, or office space. With a frequency range of 50MHz-12GHz, it can detect both digital and analog signals emitted from any unwanted device, keeping you secure against any style of unknown technology.