This Byron Wireless Doorbell Set offers a wireless range of up to 150m and features 16 melodies with 4-step volume control. The bell push is IP44 rated. Dimensions of the doorbell are (HxWxD) 100 x 70 x 60mm, and the push button dimensions are 86 x 36 x 17mm. The plug-through chime unit can be plugged into any standard UK plug socket, allowing you to still use the socket for other appliances. This provides flexibility to place the chime anywhere in your home.