The Uni-Com Premium Plug-Through Door Chime can be inserted into any 13A socket, whilst leaving it still available for other appliances. The extensive wireless range of up to 150m means 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 8 chimes, including: Westminster chime, traditional Ding Dong and other pleasant sounding melodies. The volume can be adjusted to your preference. There is also a built-in mute switch which is ideal for use when children or shift workers are sleeping. 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: 88 dBA Frequency: 433.92 MHz Chime Unit Dimensions (HxWxD): 135 x 80 x 47mm Bell Push Unit Dimensions (HxWxD): 80 x 30 x 20mm Compliant with Directive 2014/53/EU (RED).