Wireless Doorbell, D-3F Waterproof Chime Kit Operating at Over 1300 Feet with 52 Melodies, 5 Volume Levels & LED Flash

Includes doorbell, receiver, and installation accessories. Uses a lithium battery that lasts 3 years; with an IP55 waterproof construction and operating temperature from -4°F (-20°C) to 140°F (60°C), this wireless doorbell is able to withstand strong winds or rainstorms. Delivers a long transmission distance of 1,300 ft (400 m) for full-home coverage and will not interfere with other devices. An abundant selection of 52 melodious chimes allows you to choose the sound you prefer; 5 adjustable volume levels with a maximum volume of 115 dB make it suitable for the elderly or those with impaired hearing. This doorbell will remember your sound levels and tone settings in the event that the power goes out; once the power comes back on, the doorbell will automatically revert to the last settings. It’s fast and simple to install the doorbell on your wall using the included anchor plugs and screws, or adhesive pad; this doorbell system can be expanded to 2 transmitters and additional receivers for increased coverage.