The Casio LA - 20WH - 9A Alarm Chronograph Watch is perfect for those who lead an active lifestyle. Whether you're an athlete timing your runs, a student keeping track of study sessions, or someone who just needs a reliable watch for daily use, this watch is for you. It's small and light, with a case size of 34.5 X 30.4 X 8.6 mm and weighing only 16 g, so it won't weigh you down. And with a battery life of up to 5 years, you don't have to worry about frequent replacements.