Mainfeatures:1. SHIDU patented appearance;2. Stylish, ergonomic and comfortable design;3. Adopt UHF high frequency wireless PAtechnology, transmission distance up to 35m;4. Support bluetooth connection, singnal transmission more fast andstable;5 Adopt SHIDU original sound amplification electroacoustic system, whichcan amplify the soundin a real &stable way;6. Built-in 3.7V 2000mAh Lithium battery;7. Super MP3 decoding technology and support TF card & USB;