The Citizen Eco-Drive Promaster Air Navihawk blends advanced technology with bold style. Its 40mm stainless steel case and triple-link bracelet offer durability, while the green dial with red and black accents is protected by sapphire crystal. Features include a slide-rule bezel, 1/5 second chronograph, dual 12/24-hour displays, date indicator, and 200m water resistance. Powered by Eco-Drive, it runs sustainably on light, no battery needed. • Powered by the Eco-Drive movement, which harnesses light from both natural and artificial sources.. • Presented on a silver stainless steel bracelet with push button deployment clasp. • Scratch resistant sapphire crystal glass. • 40mm case width. • 200 metre water resistance.