The Boonton 9200 RF Millivoltmeter is a microprocessor controlled meter, that measures RF voltage from 200 µV to 3 V in the 10 kHz to 1.2 GHz range (300 V to 700 MHz with 91-7C divider). Voltage probe data is stored in a nonvolatile memory. It has a 4 digit display that reads in mV or dB.