... HDD, with VGA 3. RS485, mouse, USB, 4CH Digital Video Recorder Real-time Recording H.264 Network DVR FeaturesWith H.264 High efficiency ... (accurate to second)Space OccupationAudio: 28.8MB/H Video: 25~450MB/HVideo storageHard disk, , and net, SD cardBackup ModeNetwork burn, mobile Hard ... -p,75ΩVideo Output1 channel, BNC, 1.0Vp-p,75Ω and 1 VGA outputAudio Input1 channel ,RCA, 200-3000mV,5KΩAudio Output1 ...