The NEW Breeze SA994 Bundle system includes 2 SA94 headset transmitter and 1 SA900 dual antenna UHF receiver and 5 foam windscreens. Features an easy-to-reach power on/off switch and channel selector button. 12 channels available on this system which can work simultaneously. Tiny, lightweight mic transmitter attached right to mic. Breeze COMBO headset/transmitter mounts right on Supreme Audio's comfortable and Hard-Use™ SA159 headset. Built-in the latest Lithium Ion technology so that the battery has a life of 5 hours. When not in use, simply snap the charging module right over the mounted transmitter. Fully recharges in 3 hours. The Lithium Ion batteries have no memory problem so cannot damage the battery by charging it frequently.