H.264 Stand-alone Dvr Specification:

Video Input/Output:   BNC 4CH In/1CH Out/SPOT Out        

    
Audio Input/Output:   RCA 2-channel input/2-channel output

1 RJ-45 Ethernet connector,1 USB 2.0 ports,RS-485/RS-232

Compression Method   Video: H.264 Baseline Audio: ADPCM

One fixed HD inside, Over 500GB,ATA-100 interface HDD x 1

Dimensions:(L×W×H) 475mmx340mmx160mm,weight: 6.8kg