Diamond SX 200 Meter 1.8-160 MHz. Indicates average and peak power. Scale 5-20-200/400 W. Size 155 x 103 x 64 mm.Meter: Displays forward RF power, reflected RF power and SWR. Meter has 3 scales. Upper scale is for SWR measurement with high (H) and low (L) power. Low-power SWR scale is for RF power less than 5 W. High-power SWR scale is for power greater than 5 W. Second and third scales are for RF power measurements with full scales of 5 W, 20 W and 200 W.Range switch: Selects full-scale RF power measurement between 5W, 20W and 200W.Function switch: Selects measurement function between RF power and SWR.Calibration buttonPower direction switchAverage/PEP monitor switchMeter zero adjustment screwTransceiver inputAntenna input13.8VDC input