The material of the Casio 50th Anniversary Digital unisex ringwatch CRW-001-1ER watch case is stainless steel, its color is silver, the material of the strap is stainless steel and its color is silver. The diameter of the watch case is 20 mm, its shape is wheel. The glass of the watch is crystal (difficult to scratch), its mechanism is quartz, and its water resistance is 3 atm (30m) (drip-free).