Blue Casio W-800H-2AVES Digital Watch The body and strap of the blue Casio digital watch are durable polyurethane. The watch is waterproof and has a timer, LED light, automatic calendar and many other useful features: Waterproof: 100 m LED backlight 12h / 24h display Equinox signal Timer Stopwatch Alarm and snooze function Automatic calendar Body width 37 mm Material: polyurethane Glass: acrylic Color: blue Battery life up to 10 years battery Casio is a Japanese manufacturer of electronic devices, which is especially known for its high-quality and durable sports watches. Casio watches have versatile features and are suitable for both extreme sports and active everyday life. Casio watches are also popular among conscripts due to their durability and excellent value for money. See all Casio products here