The handheld wireless microphone transmitter shall be the AKG HT 40 PT 40 Bodypack Transmitter. The transmitter shall be a UHF bodypack radio transmitter tuned to one fixed carrier frequency within the 710 to 865 MHz band. Controls shall include on/off and mute switches and a low battery indicator. The transmitter shall have an audio bandwidth between 40 and 20,000 Hz and THD of max. 0.8 % (1 kHz). It shall have a miniature XLR connector for connecting interchangeable microphones. The transmitter shall operate on 2 x AA sized batteries for at least 30 hours. The bodypack wireless microphone transmitter shall be the AKG PT 40.