Great for jazzercise, aerobics, fitness classes. Pouch is designed for securing and concealing wireless transmitters in the small of your back. The pouch is sewn into the belt and provides a comfortable fit and a snug, secure grip for the transmitter. Simply insert the transmitter into the pouch and secure it with the hook and loop closure, wrap the belt around your body and fasten anywhere along the belt with the integral hook and loop flap. The beltpack is black on one side and light beige on the other side giving you a choice . Transmitter fits in vertically.