mini speaker for mobile mp3 computer

Description Technical specification:1) Big powerful sound 2) Shell Painting: PU PAINT spray 3) Color:Black Coke red White Pink (optional) 4) Dimension: 60mm x60mm x 44mm (closed resonator) 5) Net weight: 83g 6) Speaker: Magentism prevent φ40mm 3W/4Ω 7) Loudspeaker Output: 3W 8) Rating power: 32.0W 9) Frequency response: 100hz-20Khz 10) Signal to noise: 80db 11) Distortion: 1.0 12) Playback Time: Up to 12 hour depends on volume level 13) Battery voltage capacity: 400mAh 14) Battery Charging voltage: 4.2V 15) Battery charge time:5V 2.5hours,USB 4 hours 16) Battery charge time:MP3 volume at 20mv,up to 12 hours