... HD DVR card - Full-HD 1080P - Advanced H.264 technology - PC based HD DVR software Main functionsAudio and video hardware compression card, ... split, Support Tour functionAudioInput4 channel, BNC(Sub card expansion)CompressionPCM(G.711)Sampling Rate16bit/8KHzBit Rate64KbpsSystem ... ×106.6mm PC based HD DVR, The first Full HD 1080P DVR Card - VEC-6004HDI, plus PC based HD DVR software