------ Comment on the earphone covers the old model (before mid 2013). Waterfi now offers another model that I do not know its quality --------
The only downside is the headset that comes with. I find it uncomfortable and fell easily enough ears when you do too much head movement while swimming (especially the crawl), even if I followed the advice to the earphone prior to contact with water.
In sum, I find it more interesting to buy just the waterproof iPod, also proposed to the seller and buy other headphones, I found around 9 euros on Amazon brand Pyle . It fell even for an hour swimming.