Easily links / extends any existing MIP/2/3 System Door chime system. No battery is required as it is powered by the mains power - a UK 3 Pin mains plug fitted /moulded into this chime / receiver unit. Just plug it in!. Replacement or additional mains plug-in chime receiver for Lloytron and MiP and MiP3 wireless door chime / entry / security system. Can be used with doorbell units and magnetic door alerts etc. etc. Variable volume control, Approx. 200M range (unobstructed). Choice of 32 melodies (see description below for full list), Current melody playback function. Also has a useful flashing strobe feature for anyone who is hard of hearing. Chime dimensions: H 9 x W 5.5cm (approx.). 7dayshop stock a competitive range of products : photo, computer, memory, inkjet, audio, video, battery, gifts ideas, gadgets and much more.