Power Source Transformer(AC 110V-240V) Assurance_temperature -40 to+50°C Camera 1/3 inch CCD color or B/W Lens F=2 viewing angle=92.8 Min Illumination 0.1 Lux Resolution>450 lines Monitor CM-02NERV or CM-02NERI or CM-02NERG/G-C color and B/W optional Max_Wiring Distance Use 75-5 video wire, use RVV2x0.75 wire between door station and power, use RVV(3+N)x0.3 wire between door station and indoor phone. Dimension 342*236*80mm for indoor phone Weight about 1.0kgs for door station, 1.5kgs for indoor phone Tv System PAL or NTSC Ring Bell chord music Wiring 3+n+1, n is the quantity of apartments Call Function dual communication between door station and monitor is available Extension not available Door Release function can open the lock via pressing LED can easily identify visitor even at night Specification Opening conversation; We also have CM-02NE(2*8,1*2,1*3,1*4,1*5,1*6,1*7,1*8) for optional.High-performance CCD Camera, with infrared illumination, you can easily identify visitor even in back lighting or the luminance is as low as 0.1 Lux An ancillary system is optional: Accessory door station panel provides 2*10 and 2*12 families for your selection.(Note: main door station panel 2*6 matches accessory door station 2*10, main door station panel 2*8 matches accessory door station 2*12) Auto-illuminated keyboard at night, the video monitors are endued function of voluntary monitoring The system is compatible with handset WL-02BFD, color or B/W video system is selectable. System componets: door station: CM-02NE(2*6,2*8,), can be color or B/W. indoor phone: CM-02NERG, CM-02NERM, CM-02NEGH Video distributor: VM-2A, VM-4, VM-8, VM-20 Power supplier:PS-5A or PS-5E transformer for optional