Key Features 40mm Driver, Dual Passive Radiators Bluetooth 4.2 Wireless Connectivity Party Mode and Stereo Mode IPX7 Waterproof Wireless audio streaming and portability are combined in the Bose SoundLink Micro Bluetooth Speaker in black with a black strap. This speaker pairs with devices over Bluetooth 4.2 with helpful voice prompts, enabling you to stream your favorite tunes through its 40mm driver and dual passive radiators. It can also pair with a compatible unit for Party Mode, where all speakers play the same track, or Stereo Mode, where one plays the left channel and the other plays the right channel. IPX7 waterproofing lets you use it by the pool or in the rain and the Bose Connect app enables control from afar via your smartphone. Alternatively, track and volume can be controlled with on-device buttons. When a call comes in, use the SoundLink Micro as a speakerphone, or use it to access Google Assistant or Siri. It's also compatible with Amazon's Echo and Echo Dot. The speaker is equipped with a built-in rechargeable lithium-ion battery that provides up to six hours of playtime. The SoundLink Micro charges via its micro-USB interface. In the Box Bose SoundLink Micro Bluetooth Speaker USB Charging Cable