Description from Bose
Bose SoundLink Mini Bluetooth Speaker II ($200) provides superior sound quality due to built-in 5_ frequency drivers. Enjoy clear and heavy sound in the range of 30 feet with the ease of carrying the speaker anywhere and everywhere because of its light weight. You can enjoy non-stop music for 7 hours due to its lithium-ion rechargeable battery and a full-range listening experience powered by its advanced audio performance. All of this makes it the most compact mobile speaker from Bose which you must add to your entertainment gadgets.