Video door phone

Monitoring button and easy installation; 4 wires in polarty system; Contrast,brightness and chime volume controls; Expandable video and audio station. IPV-300 Screen: 4" B&W Flat CRT; Video Input Signal: 1.0Vp-p 75ohm; Communications Method: SYNCHRONIZATION; Power Consumption: 18 walts; Dimensions(W/H/D)mm: 190*225*55; CRW-5S Image Sensor: 1/ 3” B&W COMS Camera with Infrared LED View Angel: Angular Fixed Surface type for plastic material System: PAL OR NTSC Dimension(W/H/D)mm: 110*140*30
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