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 ... with a 3.5mm audio output jack.4.Connected with PC by USB data cable,it has download function5.Built in ...