DescriptionThis item is a set of wireless doorbell, made of material. With waterproof design, the transmitter of the kit allows being installed outside and they can normally work under the weather of rain, snow and wind. The control range can reach up to 1000 feet in open air which is long enough to hear the doorbell ring around house, which ensures you will never miss a visitor, even if you are a few rooms away or on another floor.Features- Color: Black/White. - Size:Reciver: 9.5 x 6.5 x 2.4cm;Button: 7.5 x 5.1 x 2cm. - Material: Plastic. - Voltage range: 110-220V. - Working range: 300M. - Power voltage:Reciver: AC 110-240V;Reciver: 12V 23A. - Type of plug: US Plug. - Just plug the mini receiver into a socket and fix the transmitter on a wall with the accessories provided. - Including 2 screws, a piece of "Please Ring Bell" warning tape and a piece of double-sided bonding tape. - 300m/1000ft ultra long wireless range will not interfere with other equipment in your home or those of your neighbors. - Stereo speaker delivers rich and crisp sound with 3 adjustable volume levels. - 38 varied chimes provide 38 kinds of beautiful music to choose, setting your favorite chime and change the monotonous ring of "Ding Dong" to make your house alive.