Movement type: Manual Mechanical Movement Movement function: 3 pointers, Manual winding Case material: Zinc Alloy Case technology: plating Bottom cover type: See-through bottom cover Case diameter: 40mm (excluding crown) Shell thickness: 13mm (including lenses and bottom cover) Belt length: 250mm Case ear position: 20mm (position connecting the case and strap) Watch strap material: PU leather Watch weight: 51g (including strap) Mirror material: hardlex glass Mirror type: Arched dome glass Crown type: Plug-in crown Waterproof level: 50 meters waterproof Packaging: watch *1 Manual Mechanical Movement, Not need to install battery, Only need to wind the mechanical watch and it would keep working, Note that you should winding it every day. Arched Dome glass watch mirror, Especially exquisite. 40mm Alloy Steel Case, PU leather strap, Very Fashionable, Charming for all occasions. Amazing looking watch, a great gift for family and friends. 50M waterproof meets daily waterproof needs. suitable for short periods of recreational swimming and showering, but not diving or snorkeling. We provide professional services. If you need more detailed information about our watch, please contact us. We will be happy to answer and help you at any time.