Material Resin Country of Origin China LED Light, Daily alarm, Hourly time signal 1/100 second stopwatch, Measuring capacity: 59'59.99", Measuring modes: Elapsed time, split time 1st-2nd place times, Auto-calendar set at 28 days for February, 12/24 hour formats Accuracy: /-30 seconds per month, Battery: CR2016, Approx. battery life: 7 years 100M Water Resistant "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. Suitable for everyday use. Will withstand accidental splashes but not suitable for swimming.