handsfree color video door phone

Video intercom system(hands free video intercom) Features The system is an excellent mixed system which is applicable for single building and housing district with buildings and villas.Besides the common functions of calling, answering, unlocking, there are more useful features as follows: BUS cable, Plug-and-play.Up to 431 apartments in each building.Up to 8 door stations in each building.Up to 8 guard units and 8 perimeter gate stations.Network system supports many buildings.TCP/IP technology is adopted.Intercom between apartments, even in different buildings.Picture memory and burglar alarms.Anti-vandal, waterproof, and flush mount.Illuminated keypad and night viewing.Door release by card of PIN code.Door stations Technical parameters: Camera: 1/3 CCD Display: LED or LCD Min. illumination: 0.01LUXVideo Output: 1Vp-p/75Audio SNR: ≥50dB Audio distortion: ≤5% Working voltage:DC12V±10% Working current:≤500mA Power waste:≤160mA(static);≤410mA(active); Environment Temperature: -40 70°cIndoor phones Technical parameters: Display: 4 CRT/TFT-LCD, or 3.5'',5'',5.8'' & 7 TFT-LCD Display:420TV lines(B.W), or 300,000 pixels(color) Working voltage:DC12V±10%(audio);DC18V±10%(vedio); Audio SNR: ≥50dB Audio distortion: ≤5% Working current:≤150mA(audio);≤150mA(vedio)Power waste: ≤30mA(static);≤80mA(active)Power waste: ≤60mA(static);≤210mA(active)Environment Temperature: -10 55°c