Etekcity Wireless Doorbell Operating at 1000-feet with Plug-in Receiver, Battery-powered Receiver and Push Button, 52 Chimes, White (1-2) 52 different music chimes. Operating range of 1000 feet. Four levels of adjustable volume from 25db to 110db Weatherproof Durability: Remote transmitter button is rated IP33 weatherproof and acceptable for outdoor use. CE, FCC, RoHS certified. Easy set-up: Select from 52 chimes and 4 volume settings. No professional installation needed. Receiver includes a bright blue LED visual alert for the hearing impaired. Custom Expansion: Pair systems across added transmitters and receivers. Select different sounds for different entrances. Includes 1 Plug-in Receiver, 1 Battery-powered Receiver and 1 remote weather proof transmitter button, double sided sticker, anchors, screws and 1 battery for remote transmitter