H.264 compression,4 channel standalone dvr,support SATA HardDisk, Mouse,USB,network,IE ... FEATURES:• Stand-Alone DVR, H.264 Compression • Playback resolution: 4 x CIF• Support capacity 2000GB• High quality video Display : ... 625Line,50f/s), NTSC(525Line,60f/s)Video Input4 channel, BNC , 1.0V p-p/75ΩComposite Video Output1 ... , 1.0V p-p/75ΩMonitor Video Output1 channel, BNC, 1.0V p-p/75ΩVGA Interface1 VGA, ...