KERUI M521 Outdoor Wireless Doorbell Smart Home Security Welcome Chime Kit Door Bell Alarm LED Light Outdoor Button Battery

SPECIFICATIONSWorking Voltage: 100~240VWorking Power: 0.5WRing Songs: 57 Music songsReceive Frequency: 433MHzReceive Distance: 80 metersPower: Electric SupplyOrigin: Mainland ChinaItercom: NoItem Type: Wireless DoorbellFeature3: Home Wireless Smart DoorbellFeature2: Wireless Smart DoorbellFeature1: Wireless DoorbellFeature 5: Alarm modeFeature 4: Welcome modeConnection Type: WirelessCertification: CEBrand Name: KERUIAlarm: Yes