Quick to setup, the CR99's Group scan helps avoid conflicting frequencies, while its IR sync function allows users to wirelessly match the transmitter to the receiver’s operating frequency. The CR99 receiver features a bright, backlit LCD for monitoring on dark stages, even at long distances. The LCD also shows the exact battery life of your transmitter, along with the channel number and its corresponding UHF frequency. Audio reaches the CR99 Wireless Receiver receiver via the CB99 Beltpack Transmitter, which features Samson's SE10 Earset Microphone with Miniature Condenser Capsule, moisture-resistant design and locking connector. Offering eight hours of battery life using two AA batteries (not included), the CB99 transmitter features a variable Gain control, popless 1-touch Mute button and metal belt clip.