uxcell Waterproof Wireless Doorbell with 36 Chimes 4-Level Volume, 900 ft Range, No Batteries Required for Receiver, White CE, FCC, RoHS certified;You can install the doorbell in kitchen, living-room, bedroom, etc,and it can reach a distance of up to 280m/approx 1000ft when there are no obstruction. Completely wireless operation; no wires or cables required ,With excellent waterproof performance,Remote transmitter button is rated IP44 waterproof and acceptable for outdoor use, This wireless doorbell has pretty streamlined appearance which shows the elegant tastes of the host. The doorbell receiver features 36 chimes included for all people to choose and Four levels of adjustable volume to suit your needs. .Designed an intelligent blue flash light at the receiver for the people who is hard-in-hearing could also inform the host of any information.Energy-saving design of environment protection,Easily plug receiver into an electrical outlet (no batteries required for main receiver).