1.8CH CCTV DVR with 1 channel D1 2.USB Mouse 3.1 SATA HDD,Max 2TB HDD Supported 4.H.264 Compression 8CH H.264 D1 DVRZS-3508HSItemSpecfication Model nameZS-3508HSVideo standardPAL/NSTC(optional)Compression formatH.264 ,(preview,recordering,playback,backup,network monitoring and mobile phone monitoring),work full-time operation of sixVideo input8 channels,BNC Video output1 channel TV,1 channel ...