Axess SPLW11-7 Boombug Wired Mini Portable Speaker with Rechargeable Battery (Light Blue). 3.5mm audio jack compatible with media players, mobile devices and laptops. Rechargeable batteries with playback of up to 10 hours. Daisy chain boom bug for enhanced sound. Compact and robust design promises easy portability with an outstanding performance. 40mm driver to project richer and fuller sounds .