... .Play time 2-4 hours round speaker , portable, for mobile/notebook/mp3/mp4selling point1.Mini pop up, portable, unique design, small case give ... , MP4 player, PC, computer, laptop, mobile phone etc.4.Use with rechargable battery,mini,portable,easy to take ,can enjoy music anywhere ... glad to answer inquiries. Contact us now.Thank you! round speaker, portable ,for mobile phone/notebook/mp4/mp3 (SP-105)