HS-UBKT combines the freedom of wireless and the convenience of an all-in-one headset mic and wireless transmitter – in other words: no wires running from headset microphone to a separate body pack. The lightweight, comfortable-to-wear HS-UBKT offers a unidirectional microphone element and features a built-in 5mW fixed-frequency transmitter bud powered by 1 AAA battery. The transmitter bud contains separate power and mute switches, adjustable gain control, and a low battery indicator. The HS-UBKT works great for aerobic instructors and active performers who don't want to worry about a body pack transmitter falling out of a pocket or off of a belt. Flexible microphone stem allows for easy adjustment of the microphone's position as you wear the headset. The HS-UBKT can be paired with either the PSERL or ECMRL receiver. Complete kits are available.