IQ America Battery Operated Wireless Doorbell Kit for One Door. 1 Chime & Button

Wireless battery operated doorbell for single door applications. 

Features 2-note melody chime. 

Self-programming to avoid interference with other systems. 

Chime box works with (3) AA batteries, not included

Wireless push-button works with (1) CR2032 lithium battery, which is included. 

3.25 inches wide x 4.25 inches high x 1.5 inches deep.