Diamond Original SX400 SWR Power Meter 140-525 Mhz. Illuminated meter Switchable R.M.S. or Peak Power Measures forward, reflected & VSWR Power Meter, Peak Power/SWR, 140-525 MHz, 5/20/200w Ranges, SO-239, Illuminated, 12 Vdc, Each Size: 6" x 2" x 4", 2 lbs