The 3rd generation in MIP System technology allows you to choose different sounds for different bell pushes and other transmitters with the flick of a switch so you can identify which door or room has been activated. The Lloytron USB Rechargeable Door Chime Kit has a huge 200m wireless unobstructed range expandable further by using the MIP Signal Booster accessory, includes a Window Sticker to ward off cold callers from your door and it is compatible with previous MIP System generations. Lloytron MIP3 Lithium Rechargeable Portable Door Chime Kit is more than just a doorbell, you can create the perfect alert system for your home or business. Features and Benefits Compatible with previous MIP System generationsIt can easily be linked to any existing MIP System Door Chime range as a replacement or additional mains operated door chime unit. USB RechargeableLasts approx. four months from full charge on typical usage. 32 melodies It includes 32 sounds: Big Ben, Westminster ch