The Casio F-91WM-7A F91WM Digital Alarm Watch is perfect for anyone who needs a reliable and stylish timepiece. Whether you're a student, a professional, or an athlete, this watch will keep you on schedule. It's water-resistant, so you can wear it in the rain or while swimming. With a long battery life of up to 7 years, you don't have to worry about constantly changing the battery. The watch is also lightweight, weighing only 21g, and has a compact case size of 38.2×35.2×8.5mm, making it comfortable to wear all day long.