M3 720P Smart WIFI Ultra Low Power Video Visual Doorbell With Ding Dong Version, US Plug(Black) Filter-Security Display Holders The internal microphone is an

The internal microphone is an indefinite capacitor MIC

Resolution 1920*1080

78inch * 13

One Package Size 18cm * 8cm * 5cm / 7

M3 720P Smart WIFI Ultra Low Power Video Visual Doorbell With Ding Dong Version, US Plug(Black) Filter-Security Display Holders The internal microphone is an1. Watching anytime anywhere if you wanna see it. No wiring,installation is extremely simple,using ultra low power technology,effective use for more than 8 months ,not only convenient,but energy saving and environmental protection. 2. The design of remote controller without screws,anti dust,continuous transmission ensures complete reception of the signal. 3. Guests can make video voice call,and record for a short video,the owner will know who in front