Mini speaker, clip-on,portable,pocket speaker:
1.Built in rechargeable 500mAH
2.Singal noise ratio:60dB
3.Play time:4 H

Founctions:

Mini speaker, clip-on,portable,pocket speaker:

1.TF card support
2.Ultra portable design,supper voice, good  sound quality
3.Work with any audio source with a 3.5mm audio output jack.
4.Connected with PC by USB data cable,it has download function
5.Built in rechargeable 500mAH,3.7V lithium battery

Specifications:

1.Maximum operating current:200mA
2.USB charging voltage:5.0V
3.Maximum charge current:500mA
4.Maximum outpout power:2W × 1
5.Frequency respose:40Hz-20KHz
6.Singal noise ratio:60dB
7.Speaker impedance:4ohm × 1
8.Charge time:≤2 H
9.Play time:≥4 H