We are Haiersen Electronic Company based in Jiangmen, China. We are member of TradeKey.com since March, 2014. Our business is related to Electrical & Electronics Supplies industry and we specifically deal in Microphone. Please find our product details below: 无线会议系统话筒 The machine features 1: Use UHF600 to 870MHz frequency band, strong anti-interference. 2: PLL with high precision quartz crystal, plus microcomputer chip control, high frequency stability. 3: w Thank you for taking time to go through our business profile. If there are any questions, inquiries or comments, please feel free to contact us.