The one-piece design looks light and unobtrusive, while the 4GB of storage should offer enough capacity for most people's workout music. But of most interest here are two other features; this thing is super-fast to juice up and takes just three minutes of charging for one hour of playback. It's also waterproof, so you should be able to wear it in the pool with no problems. Available in black, blue, white and pink from March this year, it will cost $US100. We'll let you know about Australian availability and pricing as soon as those details are released.