This is our favorite non digital meter. Dave's been using his for 18 years! The meter features both cell phone frequency RF measurement as well as a single axis ELF gaussmeter. The gaussmeter feature is calibrated around 50/60 Hz and also offers 2 scales: 0-5 and 0-50 mG. Remote probe with 2 foot extension cord allows user great flexibility and reach. Both RF and gaussmeter provide audio sound and large flashing light which corresponds to field strength so you can hear and see in the dark when you are getting a positive reading. It includes complete documentation on how to conduct proper measurements.