We can provide Tour Guide System : Super mini, light weight, metal shell and five colors for choice uhf professional frequency, pll synthesized design, 32 channels available 16 digital id pilotone design to avoid the background noise high performance double-if circuit design to enforce rf level 96*64 dot matrix. White lcd display lcd display channel, frequency, volume, battery, rf level, af level, transmitter gain, rf power, and lock. Mode transmitter dynamic display of af level, af. Over load warning, 31-step microphone gain adjustment design. Quick-mute function receiver digital 16-step volume control receiver digital 21-step sq adjusting. Locking protection of panel operation with security codes inputting lithium-ion battery working for 9-11 hours. Two ways of attaching belt clips: downwards and upwards transmitting range: 100 meters (in sight).