The Lloytron MIP System 3 Chime Receiver is an accessory and will not work alone; it must be paired with an MIP System transmitter or kit. It's ideal for those who already have an MIP System and are looking to add/replace a chime receiver OR are new to MIP and purchase this product with any MIP transmitter.With 32 high quality true sound melodies to choose from, you can select traditional ding dongs, church bells, buzzers, festive tunes, sound effects and security messages. There's a chime replay button and selection buttons to make choosing your melody simple. The chime receiver has variable volume control up to 80dB and a visual LED strobe which flashes when activated; this is particularly helpful for the hearing impaired, providing a visual cue when visitors are at the door. With a huge unobstructed wireless range of 200m the chime receiver is ideal for use in the home, outbuildings or the workplace. Linking wirelessly to the transmitter, there are no unattractive wires or damage to