Self-Power Wireless Doorbell<br> <br> 1.32 Songs Home Welcome Door Chimes<br> <br> 2.150M Long Wireless Control Distance<br> <br> 3.Waterproof Door Bell<br> <br> 4.Four leverls of volume<br> <br> 5.Self-Power,No battery required<br> <br> Features 1 :Strong Signal<br> It can penetrate 3-4 walls and wireless range up to 150 meters in open area,great for large house including willas, apartment,offices,shops,warehouses.etc.<br> <br> Features 2 :IP68 Waterproof level<br> Rainy days can also be used,saed and durable<br> <br> Features 3 :38 Songs Home Welcome Door Chimes<br> The doorbell can be muted when sleeping<br> <br> Features 4 :Not only a doorbell but also a pager<br> When the elderly,babies,and pregnant women sleeping alone have needs,press the transmitter and the bell will ring.<br> <br> Features 5 :Smart learning mode User-friendly design<br> Multi-type plug interface, EU UK US Plug ,there is always one suitable for you<br> <br> 1.Operating voltage:AC 100-230V<br> <br> 2.Power consumption:0.25w<br> <br> 3.Wireless frequency:433 MHz<br> <br> 4.Operating temperature:>-10~+45C<br> <br> 5.Ringtone volume:>50dB/1m<br> <br> 6.Transmitter:no need battery<br> <br> 7.Receiver size:L95xW54xH68mm<br> <br> 8.Transmitter size:L80xW50xH28mm<br> <br> 9.Wireless distance:150 meter(open space)