Door Chime Wired to Wireless Module Transmitter, MIP3 Accessory, White - 

This 3rd generation wired to wireless module transmitter from Lloytron facilitates an easy link to any existing MIP System Door Chime range. It can be used to expand an old wired bell system into a fully integrated wireless MIP system so extra chime units and modules can be added or for old ornate metal bell pushes where the old system has been removed but you would like to use the existing bell push. 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.