Burglar Alarms & Security Systems

1 to 1 Home Wireless Doorbell IP68 Waterproof 38 Kinds Ringtones 4-level Volume Adjustable EU Plug Self-powered Button M Specification Operating Voltage AC 100 230VPower Consumption 0 25WWireless Frequency 433 MHzOperating Temperature 10°C to 45°CRingtone Volume ≥50dB 1mWireless Distance 150 meters open space Receiver Size L 95mm x W 54mm x H 68mmTransmitter Self... 1 to 1 Home Wireless Doorbell IP68 Waterproof 38 Kinds Ringtones 4-level Volume Adjustable EU Plug Self-powered Button M