Additional Details ------------------------------ Product description: ◆Case Material: Stainless Steel
◆Band Material: Stainless Steel
◆Glass material: sapphire crystal
◆Movement: Automatic
◆ Waterproof: Reinforced water resistance for everyday use (20 ATM).
◆Case Diameter: 40mm
◆Case thickness: 0.5 inches (13 mm)
◆Other Functions: Date, Week Calendar