Wireless audio streaming and portability are combined in the lux gray Bose SoundLink Revolve Bluetooth Speaker. This speaker pairs with other Bluetooth-enabled devices, like smartphones and tablets, for wireless music streaming. An 1/8" auxiliary audio input is also on-board for interfacing wired audio sources, such as MP3 players. The speaker is equipped with a built-in rechargeable lithium-ion battery that provides up to 12 hours of playtime. The SoundLink Revolve charges via its micro-USB interface.