Mini speaker, clip-on,portable,pocket speaker: 1.Built in rechargeable 500mAH 2.Singal noise ratio: ... .Play time:4 H Founctions:Mini speaker, clip-on,portable,pocket speaker:1.TF card support2.Ultra portable design,supper voice ... .Charge time:≤2 H9.Play time:≥4 H SX-556 pocket speaker