The Bose SoundLink Flex is a rugged, waterproof portable Bluetooth speaker rated IP67 that can float in water, withstand drops, and deliver clear, deep Bose audio in any outdoor setting. Its PositionIQ technology automatically detects whether the speaker is horizontal or vertical and adjusts equalisation accordingly, always delivering the best sound output. With up to 12 hours of battery life and a built-in microphone for speakerphone calls, it's an ideal companion for beach outings, hikes, pool parties, and travel. The SoundLink Flex is one of the best outdoor portable speakers in its class.