We are specialized in manufacturing audio product----UHF wireless tour guide / simultaneous interpretation system ,our product'sSpecial features as follows : �����per mini, light weight, metal shell and five colors for choice�����F professional frequency, PLL synthesized design, 32 channels available����� digital ID pilotone design to avoid the background noise�����gh performance double-IF circuit design to enforce RF level �����6*64 dot matrix White LCD display�����D display Channel, frequency, volume, battery, RF level, AF level, transmitter gain, RF power, and lock. Mode�����ansmitter dynamic display of AF level, AF Over load warning, 31-step microphone gain adjustment design�����ick-mute function�����ceiver digital 16-step volume control�����ceiver digital 21-step SQ adjusting�����cking protection of panel operation with security codes�����putting Lithium-ion battery working for 9-11 hours�����o ways of attaching belt clips: downwards and upwards�����5mm input jack for inputting background music, CD, MP3, etc�����ansmitting range 300 ft (line-of-sight)