Plug-In Wireless Door Chime with Socket | Dc105 Choice of 16 melodies No wiring required Bell push battery operated (Included) Approx. range: 100m Kingavon Plug-In Wireless Door Bell Chime With Socket - White | Dc105 Kingavon plug in wireless door chime is an easy to install plug in digital door chime that has a wireless range of up to 100m. It comes with 16 different melodies to choose from and can be plugged into any mains socket around your home. As this has a plug through socket, it enables you to use the socket that the chime/receiver is plugged into, without having to unplug the doorbell. The bell push requires a 1 x 12V A23 battery, which is included.