Complete multi-channel wireless set with headworn microphone. 30MHz selectable bandwidth. The PT 45 pocket transmitter is compatible with all AKG micro mics including the supplied C 544 headworn mic, and provides up to 8 hours operation from a single (supplied) AA battery, gain control and noiseless on/off/mute switch. The SR 45 receiver has XLR and TRS outputs, RF and audio level indicators and adjustable gain and squelch controls. UK power supply included. The system operates on channel 70 which is licence-free and not affected by the 2012 switchover.