The Extech 480846 RF EMF Strength Meter analyzes high frequency radiation from 10 MHz to 8 GHz. Ideal for mobile phones, cell phones, base stations, RF hotspot location, wireless network (Wi-Fi) RF detection, RF "electrosmog" detection, microwave leakage, and wireless communication applications (CW, TDMA, GSM, DECT). This meter has non-directional measurement with a 3-channel (triaxial) measurement probe, max hold and average functions, and manual store/recall for up to 99 data sets. In addition, there is an audible alert with a threshold that the user can set. The meter comes with a 9-volt battery and a carrying case.