MFJ Enterprises Original MFJ-817C Deluxe VHF/UHF True Peak 144/220/440 MHz Cross Needle SWR/Power Meter Deluxe VHF/UHF True Peak Reading SWR/Wattmeter Power ranges: 200/2 Watts forward and 50/5 Watts reflected. Reads SWR from 1:1 and 8:1. SO-239 connectors. Meter lamp uses 12 VDC or 110 VAC with MFJ-1312D