TTSAM Portable Mini Hamburger Speaker 3.5mm Plug Rechargeable Speaker with Extension Cord for MP3 Audio Laptop Cell Phone Tablet PC (Purple) Cute and stylish appearance; shapes like a hamburg. Pocket size speaker, compact but no discount in sound quality Built in, rechargeable lithium battery each charge can last for 3 - 5 hours 360-degree sound field intergrates a cone design with a custom-built speaker to project sound in all directions With 1.4 subwoofer, the vacuum base offers deep and rich sound with HI-FI result More convenient and user-friendly, perfect for both home use and travel use