Citizen Eco-Drive x Analog ft. Elegance Men Formal Hexagon 100m Water Resistant Watch BM7637-81H BM7637 BM-7637Transit seamlessly from work to play with this Citizen watch. Featuring a grey stainless steel case, H-link bracelet, and 100m water resistance, it is built for versatility. The textured black dial with applied indices offers bold legibility, while Citizen Eco-Drive technology harnesses light for endless battery-free power. A rugged yet refined everyday essential.Caliber Number / MovementE111 (solar Eco-Drive)Power Reserve / AccuracyApproximately 6 months when fully charged (+/-15 seconds per month)CrystalMineral crystalLuminousLuminous on hands and indexesCase / Band MaterialStainless steel case with stainless steel band (three-fold clasp with push-button release)Water Resistance100m / 10 barCase SizeThickness: 9.7 mmDiameter: 41.0 mmLug width: 22.0 mmOther SpecificationsCitizen Eco-Drive x Analog ft. EleganceDate displayInsufficient charge warning functionOvercharge prevention functionRegular timekeeping (analog display)