Detailed Product Description Video: 1) Video input: 4ch input, 1. 0V (P-P), 75D (BNC), PAL / NTSC 2) Video output: 1ch output, 1. 0V (P-P), 75D (BNC), BNC or VGA (option) output 3) Display: Four screens or full screen Audio: 1) Audio input: 4ch input, -8dB 22kD, RCA, AV simultaneously 2) Audio output: 1ch output, -8dB 3kD, RCA 3) Audio compression: MPEGI layer I / II, compression code rate able Record: 1) Recording frame: 100f/s (PAL), 120f/s (NTSC) 2) Picture quality: 9-grade picture quality able, playback resolution is 352*288, up to 704*576 for one channel 3) Recording mode: Constant, circular, scheduled, motion detection, pre-alarm, auto save recorded files when powered off 4) Recording time: Depend on hard disk, picture quality, 4 IDE interface can drive 1 or 2 hard disks 5) Search mode: By time, location, alarm 6) Playback mode: Fast forward, fast backward, each frame replay Backup: 1) CD backup: By connecting backup interface with CD-RW driver, the file can be played in DVR or PC 2) Hard disk backup: By connecting backup interface with hard disk 3) Network backup: By connecting network interface with PC Alarm: 1) Alarm input: 4ch input 2) Alarm output: 2ch output 3) Buzzer output: 50dB 4) Alarm mode: Picture lost, motion detection, device failure (including hard disk failure) System: 1) OS: Hardware compression, embedded real time RTOS, standalone from PC, r e Control 2) Language: Simplified Chinese, traditional Chinese and English 3) R e control: R e surveillance, replay, backup, P/T control, IE view 4) Password protection: Multi-grade password and authorization setting to ensure The authenticity of files 5) System upgrade: Upgrade system by CD or network Others: 1) Anti-vibration: 2-grade anti-vibration 2) Power supply: DC 8 - 30V input, DC 12V output 3) Power consumption: 25W 4) Dimension: 295*215*80mm (electronic anti-vibration); 295*215* 100mm(second mechanical anti-vibration) 5) Weight: 5. 8kg