This Byron 2204 Series Wired Doorbell Additional Chime Bell Push is made of metal with a highly polished chrome finish. It is robust and of quality construction, suitable for surface mounting and compatible with current or new wired door chimes. The doorbell push is powered via a separate power source and comes with a 24-month warranty. Specification: Dimensions (WxHxD): 32 x 74 x 20mm Weight: 0.1984160358 pounds Manufacturer: Byron MPN: 00.640.18