The beautiful Americana door chime brings the charming warmth of wood together with the wireless technology of today. This top quality Broan brand chime features wood and brass design simplicity with volume control and CD-quality Westminster sound reproduction. With no wires to run instillation can be completed in only minutes. This kit includes 1 white wireless button and has an operating range of up to 300 feet (range may vary) and the previously mentioned receiver. You have 64 selectable channels to ensure you will not have interference from other devices. You can chose from three different chimes -Ding, Ding Dong or Westminster Chimes. The chime has CD quality sound with adjustable tones and volume controls. One button is included with this kit but extra Wireless Button units can be purchased to allow you to have a door bell on each door to your home. Each button can be set to different chime tone so you can easily identify which door your visitor has come to. It's easy installation, reliable operation and great sound make ths unit the best wireless door door we have seen. The wireless button takes 1 A23 12 Volt battery (included). The chime takes 3 D cell batteries that are not included. The dimensions are 9 1/4 inches x 6 7/8 inches x 2 3/4 inches.