BERLIN -- Sony's still hammering away at its e-paper watch.

The second-generation watch is called the FES (by Fashion Entertainment Watch) Watch U and it's a more refined than the original model with a more scratch-resistant sapphire glass front.

Like the original e-paper watch, the watch face and the strap can be customized through its flexible e-paper display. The 43mm diameter watch case is 11.8mm thick and made of SUS316L stainless steel.

Sony's second gen e-paper watch is more expensive and has a sapphire glass screen pic.twitter.com/XBmt8bhZHZ

— Raymond Wong 💾📼🍕 (@raywongy) September 1, 2016

The FES Watch U connects to iOS, but not Android (Sony's considering adding Android support).

Because of its e-paper technology, battery life is extremely long, lasting up to three weeks on a single charge.

And like the original, Sony's not selling it directly. Sony's once again crowdfunding the watch in Japan. The original FES was successfully funded and delivered to buyers last year. Don't live in Japan? Tough luck, because there's no sign that it'll be crowdfunded in other markets.

The new FES Watch U is also more expensive, starting at about $485 versus the $240 for the original.