MFJ-9213, QRP POCKET SWR/WATTMETER, 5,30, 100 WATTS

Read forward and reflected power in 3 ranges: 5, 30, 100 Watts on a calibrated
meter scale -- Plus read SWR and relative power at any level 0-5 Watts. Bruene-style bridge circuit detects both RF current and RF voltage to ensure uniform accuracy across a wide range of load impedances, frequencies and power levels. 1.8-50 MHz, BNC in/out. 4 1/2W x 2 1/4H x 2 3/4D inches.