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