... ,50-80M remote distance,factory OEM offer audio baby monitor,baby camera,sound activated,baby transmitter receiver,use battery,50-80M remote distance ... or other sound,Receiver will be activated to sound imitated baby crying;Sound Level: 92±5Db;Frequency: 315MHz,433MHz for option ... country.OEM & ODM are both highly welcomed. Wireless Digital Audio Baby Care Detector Baby Cry Detector