The Citizen Eco - Drive Chronograph CA0770 - 81E is perfect for men who lead an active lifestyle. Whether you're swimming, running errands, or in a business meeting, this watch is a reliable companion. With a case diameter of 42.5mm and thickness of 12.5mm, it has a comfortable and stylish fit. The watch uses solar power, so you don't have to worry about constantly changing batteries. Its 100m water resistance means it can handle splashes and even short swims.