Reson Long Range Wireless Doorbell with 1 Remote Transmitter Button and 2 Receivers,Battery Operated Loud Wireless Doorbell Kit,Waterproof Digital Door Bell with Lights,100M 328Ft ,38 Chimes Tones Reson Wireless Doorbell Kit is included 1 transmitter button triggers (rings)and 2 Remote Control Receivers.New and Morden Design. Reson Doorbell wireless is Long distance transmission and high strength signal and sensitivity,Operated at 100M 328Ft wide Range. Updated More Loud 38 different ring tones and 3 levels of adjustable volume from 25db to 110db.Effectively reminds you of the coming of guests or friends. Wireless designed for easy install and operates.and it is Waterpoof and weatherproof,acceptable for outdoor use. Note:Battery of the Transimitter (23A 12V)is included,but the battery of the receiver (3 x AAA )is not included.1 year Warranty!