Features: 1.Highly reliable special DSP solution, super powerful RTOS, realize industrial grade MTBF 2. D1 High Definition network video server, compatible to Half-D1, CIF and QCIF 3. Use optimized H.264 video compression algorithm to realize transmission of High Definition video over low network bandwidth easily. 4. Uses optimized MP3 audio compression algorithm to make the sound more clear. 5. Uses the most advanced technology of network transition server to realize multi-user visit and multi-level password authorization management 6. Support real-time video surveillance output (Two-channel and Four-channel Models) 7. Support PAL/NTSC composite video 8. Built-in Web Sever to realize remote surveillance, control and ting via IE. 9. Support 802.11b/g wireless network, CDMA1X and GPRS mobile network and surveillance via the mobile phone 10. Support remote software function 11. Support dynamic IP address , LAN, Internet (ADSL and Cable Modem) 12. Bi-directional real time transmission of audio talk-back 13. Network self-adapting technology to adjust video frame rate automatically according to the network bandwidth. 14. Video bit rate can be adjusted continuously between 16Kbps and 2Mbps, frame rate can be adjusted between 1 to NTSC 30 / PAL 25. 15. Provide video loss、motion detection and sensor alarm functions 16. Provide RS485/RS232 serial port with several built-in high-speed domes and decoder protocols supports transparent protocols. 17. Support image masking/image capturing 18. Auto-recovery function if exception occurs and auto-connection if the network interrupts Technical Parameters: 1. Video Input: 4 channel composite video, PAL/NTSC , BNC (1.0Vp-p, 75Ω) 2. Video compression: H.264 3. Video Resolution:PAL:352*288（CIF） NTSC:352*240（CIF） 4. Adjustment of Video Parameters: Brightness, hue, contrast, saturation and image quality 5. Streaming Format: Optional streaming format (video streaming or audio and video streaming) 6. Video Frame Rate: PAL:1/10 - 25 frames/second; NTSC:1/10-30 frames/second. 7. Video Compression Bitrate: 16Kbit/S～2Mbit/ 8. Video Output: 1 channel composite video, PAL/NTSC , BNC (1.0Vp-p, 75Ω),Real-time picture eye on the export of four 9. Audio Input: 4 channel, RCA interface, linear input, Impedance:１Ｋ 10. Audio Compression: MP3 11. Audio Output: 1 channel, RCA interface, linear output 12. Audio talk-back input: 1 channel, MIC interface 13. Communication Interface: 1 10M/100M self-adapting Ethernet port, 1 RS485 port, 1 RS232 port; Several built-in high-speed dome and decoder protocols, supports transparent protocols ;Support 802.11b/g wireless network; Support CDMA1X and GPRS mobile networks; up port surveillance via a mobile phone 14. Alarm Input: 4 channel on/off input, supporting NO (normally open) or NC (normally close) sense 15. Alarm Output: 2 channel on/off output, 120VAC 1A/24VDC 1A 16. Input Power Supply: AC 100～240V,50～60Hz 17. Maximum Power: Less than 8W 18. Operating Temperature: -10 ~+55 degree centigrade 19. Operating Humidity: 10 ~ 85% 20. Dimension: 180mm (L) * 50mm(H)* 110mm(D)