AKG PW45 Presenter Set ISM, Perception Wireless, UHF Wireless System with pocket transmitter and CK 99 L lapelmicrophone, 4 switchable frequencies in range ISM 863,100 – 864,900 MHz 9,5″ diversity-reveiver with internal antennas, adjustable output volume, XLR out, transmitter works 1x AA Battery or rechargeable battery, low-Battery-display, on/off/mute switch on transmitter, incl. powersupply, CK 99 L and 1x AA-battery. No licence needed, free to use all over Europe.