Still use a dedicated music player for listening on the go? Sony has two new options in its Walkman line that'll do just that, and the NWZ-WS613 takes the wearable player and has it double as a Bluetooth headset. Connecting to your smartphone lets you beam tracks or listen to tunes loaded directly on the device with a ring-like controller for controls and calls that won't break your stride. A smartphone app is also capable of tweaks and skipping around -- should you want to limit the number of items in that gym bag. As you might expect, the unit is indeed waterproof to keep the sweat at bay and connects to fitness apps to further enhance those workouts. Does the wraparound look sound like a solid addition to your exercise attire? Parting with $160 in October will secure one of your very own, but for those who'd rather keep the music player and headphones separate, there's an option for that, too.