Ivation Bullet Super-Portable Rechargeable Bluetooth Speaker, MP3 Player With MicroSD Card & AUX Inputs - 4 Colored Skins & Sports Bike Mount Included Plays Music via Bluetooth, MicroSD Card or AUX Line Goes-Anywhere Bullet Cylinder Shape & 3.5 Size All 4 Color Skins & Matching Bike Mounts Included 10-Hour (Mid Audio Range) Built-In Rechargeable 820mAh Battery 3.5-Ounce Weight Makes It Perfect for Joggers Etc.