Still available is an AKG SR50 Radio Microhone. It hasn't been used for many years but was working perfectly before being replaced. It's on legal frequency 173.8 MHz. The battery cover is missing and the aerial has been replaced with a piece of wire hanging from the bottom of the mic, as can be seen from the photos. It takes a standard 9 volt battery. I'll probably be able to find you a 12 volt power supply for the receiver. If replying, please let me know the first part of your postcode. Thanks