Bluetooth Technology: With Bluetooth Technology you can achieve a smooth and seamless connection to your iPad, iPhone, iPod, Android, PC/Mac and any other device with Bluetooth connectivity. Bluetooth allows cable-free connectivity while you listen to music or watch a movie from distances as far as 30ft away. Lithium Rechargeable Battery: Our new longer lasting rechargeable Lithium Polymer battery gives you hours of wireless freedom. Now with Express Charging that charges the speaker up to 5x faster than before, providing you with more time to relax & enjoy. Durable Aluminum Body: Our Durable Aluminum outer body provides optimal heat dissipation, a strong exterior shell and a lightweight, compact design that will encourage you to take it with you. Convenient Volume Control: This innovative design incorporates convenient volume control on the side of the speaker, allowing you to adjust the volume up, down or mute when the need arises. Also includes a 3.5mm Axillar y input that allows you to connect standard MP3 players without Bluetooth connectivity, so you can enjoy our portable speakers on additional devices.