![background image](http://html1.mh-extra.com/html/ziginte/k900/k900_user-manual_3697520014.webp)
Slide green symbol--Answer
Slide red symbol---Refuse
In middle interface will show up visitor momentary photo.
Anyone phone answers then the other phones will auto hang off.
During in the call, can record , take photo and also remote unlock.
Press Mic key, can talk to visitor.
Delay button, can delay calling time.
End a call button, close to video call with visitor.