1-channel HD HDMI input, 2-channel AHD CVBS input,1-channel audio input. CEL-5112B 1 HDMI+2 AHD CVBS encoder. 1 HDMI input, 2 channel CVBS input, 2 channel 3.5 audio input. Transmission: TCP, UDP, 1000M (RJ45 Ethernet port duplex).