Damson Cisor BT5 Resonating Portable Bluetooth Speaker - Blue Works with mobile phones, tablets, mp3 players, laptops, computers and anything with Bluetooth audio enabled or a standard 3.5mm audio jack Wireless speaker delivering loud 5 watts of sound with heavy bass Built in battery  4 hrs playback wireless, up to 8 hours playback wired Battery charges through USB, USB to mini USB and 3.5mm audio cable supplied