speaker with usb, desktop speakers, usb laptop speaker

Material: ABS plastic
Audio cable:3.5mm
Size: 7.5 x 5.0 x 4cm

Technical Details ：
1)Loudspeaker output:  2W（1KHZ，THD10%）
2)Sensitivity: ≥65dB
3)Loudspeaker Impedance: 4Ω±0.5Ω Diameter:(36/4Ω/2W)
4)Lithium battery capacity: 200 mAh
5)Lithium battery : 3.7V~4.2V+0.05V 
6)Frequency Response: 200HZ——20KHZ
7)Charging time: 1 hour
8)Charging way: Computer, 5V Adaptor
9)Available color: Blue, Silver, Red, Black, Pink, Red
10)Compatible with mobile phone, Mp3, Mp4, Ipod, PDA.Etc