Frequency range:1.8to525MHz/S1(1.8 to 160MHz),S2(140 to 525MHz)Power display rating:5W 20W 200WMinimum power at SWR measuremen:S1(1W), S2(4W)Accuracy of full scale:±10%Inserion loss:S1(less than 0.2dB), S2(less than 0.3dB)Power supply:DC13.8VDimensions:155W×63H×103DmmWeight:630g