The Hybrid+ TH1 is a variable frequency, UHF, handheld microphone transmitter that couples to the Hybrid+ R4 or Hybrid+ R8 receivers (R4 & R8 sold separately). TH1, Handheld Transmitter Transmitter: LCD Screen, Infra-red synchronisation, Mute function Construction: Gun metal grey aluminum housing with black mesh capsule cover PSU: 2 x 1.5V AA Batteries (Not included) System Frequency Bandwidth: UHF Frequency bands: Selectable, 62 frequencies channels