Movement: Seiko caliber 7S36-04R0 Water Resistant : 100 m Case: 41 mm x 11.5 mm thickness ( without crown ) Case: 44 mm x 11.5 mm thickness ( with crown) Lug width : 20 mm Material : Top Sapphire Crystal See-thru case back More than 40 hours power reserve once it is fully charge Solid stainless steel bracelet with 2 pushed in buttons