Evaluate the RF emissions of mobile phone, radio and TV transmission towers, wireless camera, Wi-Fi and LAN detection and installation, microwave oven leakage, and other environmental safety concerns. Features maximum and minimum hold, an audible alarm, and a zero adjustment to eliminate background EMF. The display also indicates overload and low battery. Comes with a soft carrying case and standard 9V battery, which provides approximately 100 hours of use. Weight 6oz (170g).