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Personal Voice Amplifier (QS-383)
2016-11-05 20:12
QS-383 mini voice speech amplifiers apply to teachers teaching, tour guides explain, shopping malls salesman, outdoor le
16 Channels UHF Wireless Tour Guide System (QWG-06)
2016-10-28 17:41
Wireless tour guide system Product Feature . UHF 740-865 MHz (according to regulation) . Used Phase Lock Loop(PLL) techn