More sound all around—Engineered to deliver true 360° sound for consistent, uniform coverage. SoundLink Revolve+ II plays louder and deeper with longer battery life than SoundLink Revolve II Durable portable speaker—SoundLink Revolve+ II is water and dust resistant (IP55 rating), so you can keep the music playing even if it starts to rain. Plus, it’s easy to grab and go, with a flexible fabric handle Improved battery life—With up to 17 hours from a rechargeable lithium-ion battery, you get more play time than with the original SoundLink Revolve+ speaker. Charging is easy via the Micro-B USB port Built-in microphone—Take calls and access your device’s default voice assistant right from the speaker. Or connect the speaker to an Amazon-Alexa-enabled device, like the Echo Dot, for even more hands-free control of your music. Connecting is easy—Voice prompts talk you through pairing your device to this Bluetooth speaker. Multi-connect lets you pair two devices at one time and easily switch between them for complete control of the music.