Doorbell, LongHai Waterproof Wireless DoorBell Kit Plug-in 2 Push Button with LED Indicator Over 50 Chimes, No Batteries Required for the Receiver Our Original Bestselling Model B doorbell. B stylish modern design in classic! This is a B Series doorbell. Operating range of over 500 feet. (1000 feet in open area). Remote transmitter button is rated IP44 weatherproof and acceptable for outdoor use. Over 50+ different ring tones. Four levels of adjustable volume from 25db to 110db. Easily plug receiver into an electrical outlet (no batteries required for main receiver). CE, FCC, RoHS certified. Includes 1 plugin receiver unit and 2 remote transmitter button, double sided sticker, anchors, screws, and battery for remote transmitter.