With a refined, slim profile, clear user interface and numerous features, Beosound A1 2nd Gen. is a powerful portable speaker with an iconic design. Bang & Olufsen Signature Sound is at the heart of Beosound A1 2nd Gen., with aptX Adaptive Bluetooth technology. It features up to 18 hours of play time at typical listening volumes and is fully dust and waterproof, meaning that it can be enjoyed wherever you take it. Color: Black Anthracite