The BT Loud Indoor Telephone Bell 50e makes it easier to hear your phone when it rings. It features an extra audible 80dB, to grab your attention from a distance, or as an alert if you are having problems hearing your telephone when it rings. The bell simply plugs into a spare telephone socket or a double socket adaptor alongside your existing phone – no mains power required. Its compact design makes it ideal for warehouses, large offices or shop floors, and comes with a 3m cable to ensure it reaches your socket easily. All fixtures and fittings already come with the unit for wall mounting – no additional screws or fixtures required.