Wireless audio streaming and portability are combined in the Bose SoundLink Color II Bluetooth Speaker. This speaker pairs with other Bluetooth-enabled devices, like smartphones, for wireless music streaming up to 33 feet away. An auxiliary audio input is also on-board for interfacing wired audio sources, such as tablets and MP3 players. The speaker is equipped with a built-in rechargeable lithium-ion battery that provides up to eight hours of playtime. The SoundLink Color II charges via its micro-USB interface with an included cable.