Features: with monitoring, intercom, unlock, hands-free, ringtones selection, ring back function 1.7 inch TFT LCD, no radiation, low power, high-definition widescreen images. 2.hands-free intercom function. 3.with call ring back function. 4.electronic control unlock function. 5.there are monitoring outdoor functions. 6.the image brightness, color, ringtones volume, intercom volume can be adjusted. 7.anti-alumina panels and wear-resistant surface treatment of outdoor units, the camera can be adjusted up and down around. 8.indoor unit ultra-thin aluminum panel design, beautiful show luxury style. 9.16 kinds of chords optional, not always hear the monotonous doorbell. 10.super rain, with night vision infrared function, wall-mounted installation is simple and convenient. Performance parameters: 1.switching power supply: AC100-240V-50Hz DC15V 2A 2.he whole machine current: less than 800mA 3.call delay time: 120S±10% 4.monitoring delay time: 60S±10% 5.the camera sensor: 1000 lines 6.the lens: 3.6MM 92 degrees 7.outdoor machine with infrared night vision function 8.indoor machine Dimensions: 245×150×23mm 9.outdoor unit Dimensions: 138×98×55(H)mm 10.outdoor installation: wall-mounted Product List: 1*7 inch color LCD monitor indoor extension 1*outdoor host 1*connection line 1*power supply 1*manual (Chinese and English optional) 1*screw package