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 centre 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—with a rechargeable battery that plays up to 17hours. Pair two speakers for Stereo or Party Mode Multi-connect to two devices. 1 internal speaker. Bluetooth compatible. 8 watts. General information858366-2120Size H18.42, W10.49, D10.49cmSpeaker diameter 10.5cm. Power from USB. USB cable included. Batteries required 1 x Li-Ion batteries(included). Battery life 17 hours.