... time 2-4 hours round speaker , portable, for mobile/notebook/mp3/mp4selling point1.Mini pop up, portable, ... with MP3, MP4 player, PC, computer, laptop, mobile phone etc.4.Use with rechargable battery,mini,portable, ... .0 speakers,2.1 speakers,card speakers and bluetooth speakers.We have 6 English speaking foreign trade ... now.Thank you! round speaker, portable ,for mobile phone/notebook/mp4/mp3 (SP-105)