The SL-6193-B Wireless Doorbell Button for Heath Zenith Door Chimes is a repacement or add-on button.  The product ships with the necessary battery and has an estimated battery life of up to 2 years.  Weather resistant and outdoor rated, the product has up to a 150 foot range and a 5 year manufacturer's warranty.

• Operates Heath/Zenith Wireless Door Chime Receivers Uses (1) A23 12-volt Battery operated (Included)
• Surface mount
• Up to 150 feet range
• Dimensions: 1"w x 0.875"d x 2.5"h