As an iPhone-fitting but device-agnostic version of H2O Audio's past Amphibx armbands, the new Amphibx Fit ($60) is designed as a truly waterproof sports accessory -- safe to use in rain, sweat, or even up to 12 feet underwater. The front and back of Amphibx Fit are mostly clear, touch-through plastic molded generically to accommodate most iPhone, iPod touch, or iPod classic models, while the rest is either hard or soft opaque black plastic with an…
