... Windows, Linux. SPECIFICATION ITEMSDVR001SDVR002SDVR004 VIDEOVIDEO INPUT1 channel2 channel4 channelVIDEO OUTPUT1 channel, 1.0V, p-p, 75Ω, BNCVIDEO FORMATSupport PAL/NTSCVIDEO COMPRESSIONH ... .98Mbps ~ 4.5Mbps, 4 level video quality AUDIOAUDIO INPUT1 channel2 channel4 channelAUDIO INPUT FORMAT20KΩ, RCAAUDIO OUTPUT1 channel, 500Ω, RCAAUDIO LEVEL1V ~2V, p ...