The original U1- U6 frequencies have been permanently discontinued, and are no longer available.  These transmitters will only work with N1-N6 frequency receivers.

The Concert 77 Fitness System is a high-performance UHF wireless solution that's ideal for fitness instructors looking for clear vocal reproduction while keeping their hands free.

The new CT7 beltpack transmitter attaches to any headset wired for Samson thanks to the popular locking P3 input connection. The CT7 also features a three-segment battery indicator, separate power and audio on/off switches, adjustable AF level (audio gain), and 12 hours of battery life on a single 9-volt battery.