... Mic + Earphone Mic 4.With wheels, portable 1. Drive units: 15"X1+1"X12. Power (RMS): 70W3. With USB ,SD / MMC ... / VOLUME can adjust freely10. AC 220V 50Hz, DC 12V 7Ah rechargeable battery11. T-shape box,12. With wheels, portable TERMS AND ... ://gzhuisheng.en.alibaba.com http://www.haoyong.cn DJ speaker 15" Rechargeable Battery Speaker with LED display karaoke system