The Uni-Com Smart Plug-In Door Chime can be inserted into any 13A socket. The extensive wireless range of up to 100m means that the chime unit can be placed in any room around the home or in a detached office at the back of your garden. The weather-resistant bell push is easy to install and quickly pairs with your chime unit. The chime unit can be programmed to one of 26 chimes, including the Westminster chime or a traditional Ding Dong. All Uni-Com door chimes work together and can be mixed and matched throughout your home. Bell Push powered by 1 x CR2032 button cell battery (supplied). Specification: Sound Output: 95 dBA Frequency: 433.92 MHz Chime Unit Dimensions (HxWxD): 10 x 6 x 5.5cm Bell Push Unit Dimensions (HxWxD): 8 x 3.2 x 2cm Compliant with Directive 2014/53/EU (RED).