... 1,LCD display,synchronous lyrics 2,Usb cable &Lithium battery powered 3,Alarm function 4,Output-mode headphone 5,Aux ... greatly.3. Dual power mode: usb powering and li-on battery powering (Nokia BL-5C).4. Great bass,built-in loop radiators, super dynamic ... response: 90Hz-20KHzSensitivity: 80db±2dbSNR: ≥80db Distortion: ≤0.3%Battery Voltage :5VBattery Capacity: 800mAhCharge time: 1-2hourWork time: 7-8 ...