The Anchor Audio Megavox Wireless Beltpack Transmitter has a TA4F connector plug. With a 150' wireless range, it operates on the 540 - 570 MHz frequency range and has 16 user-selectable wireless channels. The WB-8000 is powered by two AA batteries and operates approximately 6 - 8 hours with fresh batteries. Use the beltpack with the Anchor Audio 8000 and F1+ series. Includes a two year warranty.