AKG PT420 Wireless Bodypack Transmitter (Band A: 530 to 559 MHz)The AKG PT420 is a wireless bodypack transmitter compatible with the SR420 wireless receiver. With a lightweight design, it is comfortable for performers and presenters to wear, while providing up to 8 hours of continuous use on a AA battery. The channel selection buttons allow you to quickly set the transmitter to operate on one of eight different carrier frequencies to match it with the receiver. Other features include an easily accessible 3