... p-p/75 ohm,VGA x 1Audio Input4 Channel, RCAAudio Output2 Channel, RCA x 1, Bidirectional talk x 1Alarm Input4 Channel, Trigger ... Remote Control, PTZ, Camera and RS485 x 1 SupportedBackupUSB,CDRW,DVDRW and Network SupportedResolutionDisplay: 704 x 576 Compression: CIFFrames: 1F/S~30F ... Disk)Working EnvironmentTemperature: +5 ~ +50 degree; Humid:< 90%Device Dimension200 x 280 x 185 mm (W*D*H)Weight6.5KG