... , playback Feature:1. Adopts the standard Main profile H.264 compression technology,, supports CIF/ D1 recording, Network transmission, and playback Simultaneously2. support dual ... )NTSC:D1(704*480),HD1(704*240),CIF(352*240)Recording Playback4 channels playbackRecording BackupUSB,Moved Hard Disk,USB Writer,NetworkNetwork transmission4 Channels real-time ...