GT-300T is a belt pack /portable lightweight high stability PLL synthesised UHF transmitter. It contain Belt pack transmitter with built in microphone, CL2 lavalier mic & rechargeable batteries. It has 16 programmed preset switchable channels. Audio input is via the units own inbuilt condenser microphone or from the supplied CL2 clip on microphone. GT300T is supplied with NiMh rechargeable batteries typically allowing 10 hours usage on a single full charge (16 hours on a typical non recharge alkaline battery). Operating range in free air (open field) 100 Metres.