... the call;Built-in 16 doorbell chimes for option;Intercom Function,clear talk quality;Calling out,Surveillance,Automatically Unlock ... Supply,with superior quality and flexible price offer;Good feedback from wholesalers and distributors.REMARKS:We,SHENZHEN QIYAO PLASTIC & ELECTRONIC ... and qualified personnel working with you step of the way,from Design,R & D,Mold Making,Toloing Manufacturing,till ...