Byron Wireless plug through Door Chime Kit 75m
The Byron Sentry DB307F 75m portable chime kit with 6 sounds is ideal for most homes. The chime unit plugs into the mains so you will never have to change the batteries in it and the plug-through feature allows you to still use the socket for other electrical products; for example a vacuum. Comes with an additional flashing light. Bell push requires 1 X A23 battery (supplied). IP44 weatherproof push button.