audio baby monitor,baby camera,video baby monitor,baby care detector,50-80M remote distance,use battery,factory offer,OEM & ODM audio baby monitor,baby camera,video baby monitor,baby care detector ... sound,Receiver will be activated to sound imitated baby crying;Sound Level: 92±5Db;Frequency: 315MHz ... a professional manufacturer in a wide range of Audio,Electronic and Digital devices in Shenzhen,China. ...