From Gizmodo
Another Ring-Sized Casio Watch Has Hit the Market

The CRW-002 is a miniaturized version of the company's A168 digital watch, complete with a working stopwatch and LED backlight.
TechBlastTechnology. Unpacked.UK & world technologyFrom Gizmodo

The CRW-002 is a miniaturized version of the company's A168 digital watch, complete with a working stopwatch and LED backlight.