36 Ringtones Shop Store Welcome Chime Wireless Home Security Infrared PIR Motion Sensor Detector Alarm Bell Entry Alert System

SPECIFICATIONSWorking Temperature: -10℃ ~ 60℃Working Frequency: 433.92 MHzWireless Transmission Range: 280m/ 918ft in open spaceVolume: 113 ~ 25dB (Loud/ High/ Middle/ Low)Storage Temperature: -20℃ ~ 70℃Origin: Mainland ChinaOperating Humidity: <80%Model Number: KS-SF20RMode: Welcome/ Doorbell/ Alarm/ Flash Light/ Night LightColor: WhiteCertification: CECertification: CE,CCC,CQCBattery Lifespan: 5-7 months (based on 30 times per day)