The GT-300R is a portable lightweight high stability PLL synthesised UHF receiver designed for use on licensed free UHF 863-865 MHz guided tour transmitters. It has 16 programmed preset switchable channels. Audio output is via the supplied light weight earclip for discrete / personal listening or from its internal loudspeaker. GT300R is supplied with NiMh rechargeable batteries typically allowing 14 hours usage on a single full charge (21 hours on a typical non recharge alkaline battery).