Yiroka Wireless Doorbell Smart Doorbell Digital Doorbell for the Elderly, Plug type:EU Plug

Power:Electric Supply Item Type:Wireless Doorbell Connection Type:Wireless Alarm:Yes 1.Standby power: within 3W 2.Frequency: 433MHZ RF operating frequency 3.Voltage: AC 110-220V 4.Working temperature: -20-50 Celsius Degrees 5.Battery: 12V 23A battery 6.Distance: 200 meters from the open distance 7.Controllable volume: 25-85dB