100 M Water Resistance 10-Year Battery Casio "Illuminator" LED backlight ensures easy reading during day or night 1/100-Second Stopwatch (Measuring Capacity: 23:59'59.99") Multi-Function Alarm (With 1 Snooze Alarm) Auto-calendar out until the year 2099, the watch does not have to be adjusted for the number days in month even leap year until 2099 "Necessity is not the mother of invention, invention is the mother of necessity." These are the words of one of Casio's founders. The people who created Casio were determined to 'invent necessity'- to create products that met latent needs with groundbreaking capabilities no one had ever seen before. Ever since, Casio has been doing just that, bringing new discovery and delight to people around the world. This is Casio's way of building an even more prosperous, richly rewarding world.