Mpeg 2/4 Stand-alone Dvr LL-8004M Specification: 

Video Input/Output:   BNC 4-channel input/1-channel output      

Audio Input/Output:   RCA 2-channel input/1-channel output

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

Compression Method:   MPEG2 Recording, MPEG4 Network

One fixed HD inside, ATA or SATA

Dimensions:(L×W×H) 350mm×285mm×60mm,weight: 6.8kg