Designed for Sports Enthusiasts2-in-1 design for use in bicycle and backpack. Just 3.24 inches in diameter, take this outdoor speaker as a perfect companion to rock climbing, cycling or hiking, and be prepared to take your experience up a notch. Attach the metal hook to handlebars or backpacks, itll hold tight every time. It also features adjustable bike holder and thick gasket, which enables cyclists to enjoy music in their bumpy journey without worry about their fallen speaker. 100% Waterproof & DustproofIP67 means this portable speaker has unparalleled water and dust protection. Waterproof technology, plus fabric-covered exterior, will keep it safe and in good working order if it falls into the water, even if it is soapy or salty. So it will not be influenced even in wild weather, perfect for riding, beach, pool, bathroom and other indoor or outdoor activities. Surprising Weighty Bass Built-in high quality weighty bass technology, this bluetooth speaker will rewar