with USB/SD, music EQ adjustment, wired MIC/Guitar Input portable USB speakerBasic function:with USB/SD, music EQ adjustment, wired MIC/Guitar Input Product Specification Power AC185V~265V(50-60Hz), one built-in DC 12V/4.5AH rechargeable battery, external DC 12V power inputFrequency rangeVHF 210-270MHZ one-driven-oneFrequency response50Hz-18KHz±3dBMIC Effect25-50mSpeaker8"Wireless MICwith one ...