Self Powered Waterproof Wireless Doorbell Smart Home

Itercom: NoConnection Type: wirelessAlarm: YesPower: Dry batteryFeature: NoneDisplay: NoneItem Type: Wireless DoorbellModel:: Self-powered wireless doorbellColor:: black/white optionalVoltage:: AC110~240V50/60hzSpecification:: American/EuropeanMaximum volume:: 100DBVolume adjustment:: 4 levels of volume (high, medium, low, mute)Ringtones:: 38 chords are optionalRemote control distance:: 150M (in an open and unobstructed environment)Waterproof rating:: IPX4 (daily waterproof)Environment temperature:: -10~45℃