Deep. Loud. And immersive, too. SoundLink Revolve+ II, the best-performing portable Bluetooth speaker from Bose, delivers true 360° sound for consistent, uniform coverage. Place it in the center of the room to give everyone the same experience. Or set it near a wall so sound radiates and reflects. This wireless speaker is durable, water and dust resistant, and easy to grab and go â€” with a rechargeable battery that plays up to 17 hours.