Crisp, balanced sound and unmatched bass for a Bluetooth speaker its size, plays loud & clear outdoors-for beach days or camping trips Waterproof speaker from the Inside out (Ipx7 rating), with soft, rugged exterior, resists dents, cracks and scratches Easily portable with a Tear-resistant strap to bring it wherever you go, strap to your backpack, cooler or handlebars Wireless Bluetooth pairing with up to 6 hours of play time from a rechargeable battery.Built-in speakerphone for taking calls out loud and voice access to your phone's Siri or your Google assistant Dimension(inches):3.87 H 3.87 W 1.37 D.