The RF EMF Strength Meter from Extech Instruments monitors high frequency radiation from 50 MHz to 3.5 GHz. It is ideal for locating RF hotspots, wireless network (Wi-Fi) RF detection and detecting microwave leakage. The EMF Meter supports non-directional measurement with a 3-channel (triaxial) measurement probe and can store/recall up to 99 data sets. There is an audible alarm with a user-selectable threshold. This device measures 237 x 60 x 60 mm and is available with a 9V battery and carrying case.