SMYLLS Wireless Doorbell Kit with 52 Chimes,4 Volume Levels with LED Indicator-Over 1000 Ft Range-No Batteries Required for Receivers (1 Transmitter with 2 Receivers, White) Approximately 1000 ft of wireless range: when your visitors arrive from several rooms away, you can hear immediately. 52 music chimes selections & 4 levels of adjustable volume from 25db to 110db. LED Design-Seeing is Hearing: Receivers includes blue LED alert for the hearing impaired or the senior. Package:2 wireless plug receivers and 1 waterproof remote transmitter button by 12V battery Weatherproof Durability: Built with IP33 material to stand the test of time and weather; CE, FCC, RoHS certified.