Bold sound. Bose® technology packs big sound into a small, water-resistant speaker (IPX4), Portable design. Soft-touch silicone exterior, small size and wireless design make it easy to pick up and go, Durable build. Rugged, water-resistant design lets you enjoy the music you love in more places, Speakerphone. Built-in microphone for taking calls and accessing your phone’s Siri or your Google Assistant™ from the speaker, Rechargeable lithium-ion battery. Lets you enjoy up to eight hours of play time,