black and white video door phone

black andwhite video door phone system for villa mod. HW-10A(1-15VS-3), with menmory functiona). Black and White video door phone system for villa One toThree entry systems , b). High resolution 4'CRT show module is used to display the visitor's image c). High resolution CMOS or CCD camera with night vision is used d). Two-way audio communication, clear sound e). Door release function f). Voluntary surveillance function g). Maximum 4 video extensions can be connected h). Allows more than one entrance, number of entrance is not limited i). Ringing volume, display brightness/contrast, and audio level are adjustable j). Decent design outdoor unit with full aluminium housing, flush or surface mounted installation k). Super thin smart design monitor, available with white color and grey color. l). Monitor installation is surface mounted by bracket m). 5-wires at 0.3mm2 for connectionPacking:All-In-One Colored Gift Box 5pcs One carton ,carton size : 54.5cm*41.5cm*36cm