... optional,use battery,easy use,sound activated,factory offer baby monitor,wireless baby camera,audio baby monitor,315Hz/433Hz optional, ... 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 ...