Are you sick of hearing that boring old 'ding-dong' when somebody is at the door? With the Swann Wireless Door Chime you can choose from 32 in built chimes allowing you to change chimes and volume level whenever you like. The unit also features an eye-catching backlight that flashes when the ringer is activated. The Swann Wireless Door Chime is 100% cable free, allowing you to place the Button Doorbell up to 330ft (100m) from the Speaker Unit. Even better, being battery powered (runs off 3 x AAA batteries, not included) you can place the unit virtually anywhere allowing it to be moved around the home and relocated when moving house. Everything you need for a 5 minute DIY installation is included in the pack, with mounting screws and double sided tape. The Swann Wireless Door Chime with Compact Backlit Design - it's advanced security made easy.