Features:  1. High-definition digital tube display frequency, makes operation more easy and convenient.  2. The built-in polymer battery, not only can be used repeatedly charging, and light weight use safety.  3. A single Charge , can always use more than 10 hours, long battery life  4. Super multi-channel optional, will not interfere with each other 200 optional channel  5. There is no limit on the amplification products, mainly to accept FM radio signals and electronic equipment with audio playback function can be used instantly into a megaphone.  6. Small and exquisite, portable, amplification function anytime and anywhere.  7. Widely used: teaching, tour guide, sales promotion, lectures, meetings, karaoke, fans singing and so on purpose.  8. The use of a single wireless FM microphone, can make two hundred loudspeaker devices and public address broadcast at the same time, think about what the situation.     Specifications:  Color: Black  Transmission frequency: 87.0 Mhz to 108Mhz               Operating Steps:  1. Switch on the main power supply of microphone, and the Screen will display radio station band number.  2. Press the"+" "-" key to adjust the radio frequency, and choose a band number between 87.5MHz~108MHz. (Note: Select the number that it dose not exit in local radio frequency bands, for example 89.7)  3. Turn on the machine that with FM radio function, stretch antenna  and tuned to FM radio mode, tune radio frequency  into the same with the number of display.  And you can use the Wireless microphone after the machine matching pair with the ratio frenquency.  4. Put the Microphone on your head and speak into the microphone, you can amplificate your voice.      Package Content:  1 x FM Wireless Microphone Headset  1 x USB Cable               Packages:          1* FM Wireless Microphone Headset       1* USB cable