1) H.264 compression format, but currently16 CH only supports CIF resolutionH.264 2) Linux operation system, graphical interface, supports mouse, front panel and IR remote control operation 3) Support IE browse, real-time network monitor and DVR parameter setting, audio network transmission 4) Support 4 CH audio recording inputs, audio channel bonding, recording, playback, network transmission and real-time record 5) Multiple recording modes: manual recording, timing recording, alarm recording(motion or sensor input), timing & alarm recording( low frame rate recording before alarm, if in motion or sensor input alarm, frame rate is increased) 6) Supports playback of event categories and accurate time; RS-485 port to support PTZ control 7) Support video signal loss alarm; automatic password protection for the sake of illegal operation 8) Support USB flash drive and HDD backup 9) Support 2 SATA HDD, capacity of single one is to 1024 G 10) Support auto recovery when power off or reset 11) Video compression format: Main profile H.264 12) Video output: NTSC/PAL: 16 channel BNC input, 2 channel BNC output (1 channel CVBS, 1 channel SPOT) 13) Audio: 4 channel input/1 channel output/one channel intercom 14) Display resolution: 800 x 600 60HZ, 1024 x 768 60HZ, 1280 x 1024 60HZ 15) Record frame rate: PAL: 5/6/12/25 fps NTSC: 5/6/15/30 fps 16) Record resolution: CIF/Half-D1/D1 are optional 17) OSD output: VGA/CVBS 18) Image Quality: Lowest, Low, Normal, High, Highest 19) HDD: Support SATA port 20) Video standard: PAL/NTSC 21) Alarm input/output: 16 channel input/4 channel output 22) Real-time Monitoring: Analog output, realize monitor functions through monitor 23) Record Storage: Support HDD to save real-time record 24) Backup: Support USB flash drive, removable drive, network backup to HDD 25) Playback: Enable single CH and multiple CH to search playback via DVR or Network 26) Network Operation: Support remote access by authorized users to increase expansibility and security of system 27) Alarm Setting: Support HDD & Video input alarm Management and external alarm signal inputs 28) Mouse Operation: Support Mouse operation for flexible system setup 29) PTZ Control: Support PTZ camera operations via RS-485