... , USB*1,network,Audio, RS485 , IE browse, 25languages Features:4CH,H.264 compression,support SATA HardDisk, Mouse, USB*1,network,Audio ... -channel recording and playback at the same time; Recording bitstream/frame adjustable; Support RS485 PTZ controll Model ZW-5004V ZW-5008V ... search(accurate to second) Space Occupation Audio :28.8MB/H Video:25~450MB/H Video storage Hard disk, , and net Backup Mode ...