round speaker 1.Speaker units are magnetically shielded 2.Built-in rechargeable lithium battery 3.Play time 2-4 hours round speaker , portable, for mobile/notebook/mp3/mp4selling point1.Mini pop up, portable, unique design, small case give big and rich volume2.Stereo sound effect, wonderful bass, sound beyond size3.Ideal to use with MP3, MP4 player, PC, computer, laptop, mobile phone etc.4.Use ...