Video door phone,door knocker,video intercom syste

Video door phone with digital camera and intercom 4-in-1 security door viewer built-in digital camera, color display, intercom & chimes User-friendly design so simple to use that even senior citizens and kids can operate! Hassle free installation replace the optical door viewer in minutes High sensitive camera the visitor’s picture can be taken even in poor light conditions 2.4 in (6 cm) TFT color screen provides clear and non-distorted images Auto/Manual picture taking function Built-in memory stores up to 100 pictures Date & time mark on all pictures taken Energy saving automatically switches to stand-by mode when left idle for 30 seconds Extra long battery lifeStylish colors available in black or silver Indoor Unit Size (W x H x D) 115 x 112 x 23 mm (4.5 x 4.4 x 0.9 in) Outdoor Unit Size (W x H x D) 38 x 76 x 21 mm (1.5 x 3 x 0.8 in) LCD Screen TFT color type, 115,200 pixel Screen Size (W x H) 49 x 36.7 mm (2.4 in diagonal) Camera Color CMOS sensor, 0.3M pixel Built-in Memory Min 32M (store about 140 pictures) Built-in Chime 5 selections Power AA size alkaline battery x 4 Operation Temperature 0 - 50ºC (32 - 122ºF) Operation Humidity 10 - 90% Door Thickness 25-65 mm (1-2.5 in) Spy Hole Diameter 14 mm (9/6in) or 23 mm (7/8 in) Video door phone with digital camera and intercom