Enjoy clear, smooth sound for any type of workout, at any volume, anywhere, rain or shine. Speaker Features The Fitness Speaker is with you as you shatter your own records. With its on-the-go strap, you choose where to take a stand. Three sound profiles let you go from pump up to cool off, instantly. With 36 hours of playtime and built tough with IPX7 waterproofing, you can go hard even longer. multi-link mode allows connecting two Fitness Speakers to get stereo sound on the go.