Shipped from the United States. Watch model: AD2525 Movement type: automatic mechanical movement Movement model: Japanese 8215 Movement functions: Stop-second function, unidirectional automatic winding manual winding function, quick calendar setting function, three-hand display and calendar; frequency: 21,600 vibrations/hour; number of jewels: 21; 46 hours of power reserve. Case Material: 316L stainless steel Case technology: Lassa Bottom cover material: 316L stainless steel Bottom cover type: screw-in solid bottom cover Case diameter: 39mm (excluding crown) Case length: 49mm (total length from top to bottom) Shell thickness: 12mm (including lens and bottom cover) Case lug position: 20mm (the location where the case and strap are connected) Watch weight: (137g including steel strap) Watch length: 220mm (total watch length/circumference) Strap material: Stainless steel Mirror material: synthetic sapphire crystal Mirror type: flat sapphire Mirror mirror coating: Internally coated with Swiss shadowless anti-reflective blue film Glass size:: 33.5*1.8mm (diameter*thickness) Crown type: screw-in screw crown Crown size: 7.00mm (diameter) Surface luminescence: BGW9 super luminous powder, emitting blue luminous light Hand craftsmanship: silver needle coated with BGW9 super luminous powder, emitting blue luminous color Waterproof level: 200 meters waterproof/diving [can wash hands, swim, dive, meet all daily waterproof requirements] Packaging standard: professional waterproof plastic box packaging