Bose SoundLink Revolve Bluetooth Speaker - Black - It delivers true 360 degrees sound for consistent, uniform coverage. - SoundLink Revolve's water-resistant design means you can use it more places without worrying, like at the pool or by the kitchen sink. - Soft materials let you bump worry-free. - The rechargeable lithium-ion battery plays up to 12 hours. - Just press and hold the multi-function button to access the voice input for Siri and Google Now right from the speaker. - The Bose Connect app makes it easy to connect and automatically switch between Bluetooth devices. - For those times when loud just isn't loud enough, use the app to connect any two SoundLink Revolve speakers in Party Mode. - Voice prompts talk you through Bluetooth pairing. You can connect to two devices - and the speaker remembers the eight most recently connected devices. - SoundLink Revolve speakers let you take calls right through the speaker, so words are more clear and less muffled. - A universal thread lets you attach SoundLink Revolve to just about any tripod.