Door Phone System Doorbell Intercom Entry System Wired Intercom Doorbell Kits Door Intercom Support Unlock Door Release _x000D_ _x000D_ Package includes: 1 set of door phone system _x000D_ _x000D_ _x000D_ _x000D_ The product will be upgraded constantly, the appearance and color may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. _x000D_ _x000D_ _x000D_ _x000D_ It is suitable for use in a household. When a visitor rings the doorbell outside, the indoor telephone rings, and the indoor telephone sets up to talk with the visitor. Tap the unlock button, and the electric control lock opens automatically, so you don't need to run to the door to open the door. _x000D_ _x000D_ _x000D_ _x000D_ Features: call/intercom/unlock (function) _x000D_ _x000D_ _x000D_ _x000D_ Two-wire intercom connection. _x000D_ _x000D_ With unlocking function. (Add two wires for unlocking) _x000D_ _x000D_ The aluminum alloy outdoor unit has anti-oxidation and wear-resistant surface treatment, which is durable. _x000D_ _x000D_ The outdoor unit can fill in the name or number of the household, and is illuminated by LED lights. _x000D_ _x000D_ With excellent side tone elimination circuit, the intercom voice is clear. _x000D_ _x000D_ The effective intercom distance of wire diameter is more than 100 meters (2X0.3mm connecting wire). _x000D_ _x000D_ _x000D_ _x000D_ Effective intercom distance length of connecting line: _x000D_ _x000D_ 100 meters (2X0.3mm) _x000D_ _x000D_ 150 meters (2X0.8mm) _x000D_ _x000D_ 250 meters (2X1.0mm) _x000D_ _x000D_ 300 meters (2X1.2mm) _x000D_ _x000D_ _x000D_ _x000D_ Dimensions of outdoor unit: (H)157(W)108(D)46mm _x000D_ _x000D_ Embedded size of outdoor unit: (H)149(W)100(D)28mm _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_