Feature-heavy lightweight. Ounce is the tiny, weather-resistant speaker that features big battery life, the latest version of Bluetooth and a clever built-in strap. When you’re on the move and you can’t leave your theme music behind, an Ounce is worth its weight in gold. Worry-free wireless. With impact-resistant construction and an IPX7 waterproof rating, Ounce can take a beating. It can even be submerged for 30 minutes and come out cranking. And with 16 hours of play time, Ounce holds enough juice to keep the party going all night long.