... *1,network,Audio, RS485 , IE browse, 25languages Features:4CH,H.264 compression,support SATA HardDisk, Mouse, USB*1,network,Audio, RS485 ... accurate to second) Space Occupation Audio :28.8MB/H Video:25~450MB/H Video storage Hard disk, , and net Backup ... 45 (10M/100M) PTZ Control 1 RS485 USB Interface 2*USB Loop output Not support Hard Disk 1 SATA ... Dimension 310mm x 220mm x 45mm(W*D*H) Weight 2.5 kg