Frequency Counter for Analog 2 Way Radios is easy to use and, through its four-button control, measures your radio or walkie-talkies' signal. It determines unknown frequency perfectly for maintenance personnel and race teams. With a small size, you can carry this anywhere. This runs on rechargeable lithium-ion battery and comes with a USB charger. Features include Frequency range of 27Mhz-3000Mhz, CTCSS/DCS Decoder, LCD Dim level setting, Frequency digital 0000.000 or 0000.0000, 0.2s Response time, Color Display, Auto power off, battery charging LED indicator, and an added function is Frequency Counter for DIGITAL Radio.