... ,child monitor,baby cry detector,sound activated,use battery,50-80M remote distance,alarm crying sound ... monitor,child monitor,baby cry detector,sound activated,use battery,50-80M remote distance,alarm crying sound ... .Quite sensitive.•Loud Volume:85-95dB;•Use 2 "AAA" battery for Remote Transmitter(battery ... excluded);•Use 2 "AAA" batteries for Receiver(battery ...