The Bose SoundLink Bluetooth speaker III is the best-performing mobile Bluetooth speaker from Bose. It connects easily to your Bluetooth device, and plays your music with fullness, clarity and depth. Slim and portable, it slips right into your bag or backpack. And its rechargeable lithium-ion battery lets you share your music for up to 14 hours. A silicone button panel protects from dirt and dust, and a wraparound metal grille adds to its durability. And, with an optional accessory cover, you can add color to reflect your personal style.