Lanbes Wireless Doorbell System Touch Sensor Door Chime with 52 Chime Tones. Range up to 1000ft/300m, 2 Transmitters & 1 Receiver. No Batteries Required for Receiver. Classic White. Model H321 Touch Sensor Function - Unique Premium Touch sensor operating doorbell. No buttons. Touch to operate the doorbell. Stylish and Modern design, in classic white and now with a WATERPROOF remote transmitter button.Suitable for home, apartment, office, etc. Can also be used as calling device for elderly to alarm their caregivers. Operating Range of over 500 feet. (1000 feet in open area). Remote transmitter button is WATERPROOF and usable in extreme indoor and outdoor wet water conditions. 52 different Chime 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. NO pairing is required as pre-configuration had been done on the doorbell. Includes 1 Plug-in Receiver unit and 2 Remote Transmitters, double sided sticker, screws, and battery for remote transmitter. CUSTOMER SATISFICATION GUARANTEE - ONE YEAR WARRANTY