Lantoo Portable Wireless Doorbell with 1 Remote Button and 2 Plugin Receivers, Over 1000-feet Range with 52 Chime Tones/4 Levels Volume/ LED Indicator,No Batteries Required for Receivers Super Remote Range: 900-1000ft / 280-300 meters range, you can hear clearly within this distance and practicable for large or more levels homes. Versatility: 52 chimes offer you various choices, from the traditional Ding Dong to Christmas or even Happy birthday tones. Moreover, 4 levels of adjustable volume from 25db to 110db,volume settings it can certainly be louder. Setup Easily: The battery powered push button can be fixed to the doorframe or conveniently attached to the wall using double-sided adhesive tapes(Provided)and the door chimes(receivers)can be easily plugged into electric sockets and this set allow you to use it without all the electrical wires as well as the freedom to move it as you please. Waterproof Design: The transmitter(1 push button) uses a IP44 water-Resistant and dustproof design, long life garuanteed, not worry wet or rainy day. Waterproof Design: The transmitter(1 push button) uses a IP44 water-Resistant and dustproof design, long life garuanteed, not worry wet or rainy day.