Power Source Transformer ( AC 110V-240V ) Assurance_temperature -40~+ 50oC Max_Wiring Distance 200 meters from door station to indoorphone Dimension door station: 254 x 130 x 52 mm (2*6) or 304 x 130 x 52 mm ( 2*8 ) Weight door station: 1.05 kgs (2*6) or 1.2 kgs (2*8) handset: 0.2 kgs Ring Bell chord music for 30 seconds Wiring 4-bus copper wire from door station to module WL-03NLCH, 2 non-polarity wire from module to indoor phone WL-02NLFd. Call Function Unilateral conversation from door station to indoor phones Extension Not available. Door Release function Door station will release one direct transient voltage 1.0 Ampire from door station to lock when someone presses the Unlock button in indoor phone. Specification ? High capacity: 36 households, and modularization structure is adopted. One door station + one accessory door station drive at 9 modules, one module drives 4 indoor phones;? The module can be used in different layers with functions of indicator. Malfunction of audio handset can be isolated;? Auto-illuminated keyboard at night; We also have CM-02NL(2*8) for your choice.? Four-bus connection from the door station to the module. The connection of indoor phone is 2-nonpolar-line. Short connection of any audio handset does not effect the whole system;? An ancillary system is necessary if one floor with 3 or 4 apartments; 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)? Burst mode bell; Confidential conversation; The audio handset has the function of examination.? The door station and audio handset can call the management unit via net switcher.? Net switchers and conformity unit are necessary when the system is connecting to LAN. The net switcher is used to switch signal among the door station, audio handset and management unit. The conformity unit is used to switch signal among net switcher, management unit and wall phones.? System components: door station: WL-02NL accessory door station: WL-02NLK module: WL-03NLCH audio handset: WL-02NLFD/ WL-02NLFH audio net switcher: WL-03NQH-1/ WL-03NQH-2/ WL-03NQH-4 conformity unit: WL-03NZH management unit: WL-03NMC wall phone: WL-03NW power supplier: PS-2, PS-5A, PS-9