DESC: These metal S-series player is built for sports, and they're water resistant with a spiffy "collar knob" for music navigation. The G-Sensor inside enables a pedometer, and there's also a calorie counter and a stopwatch, too. Not only does it also have an FM tuner, but its one-line organic EL display is easy to see in the dark, and it takes just three minutes to charge up the batteries for three hours of playback, or total of 18 hours of battery life on a full charge.