Movement type: Quartz movement Movement model: Japan Miyota 2115 Movement function: 3-pin/calendar, Japanese original battery Battery model: SR626SW Case material: 316L stainless steel Case process: brushed + polished Bottom cover material: 316L stainless steel Bottom cover type: screw-in solid bottom cover Case diameter: 41mm (excluding crown) Case length: 48mm (total length from top to bottom) Case thickness: 13mm (including lens and bottom cover) Case ear position: 20mm (where the case and strap are connected) Watch weight: 1 63g (including steel strap) Watch length: 220mm (total watch length/circumference) Strap material: stainless steel + full sanded strap Mirror material: mineral glass Mirror type: convex mineral glass Mirror coating: anti-glare blue coating Mirror size: 30.5*2.5mm (diameter*thickness) Crown type: screw-in screw crown Crown size: 7.00mm (diameter) Bezel material: stainless steel Bezel function: unidirectional rotation Frame size: 37.98 * 30.60 * 2.00mm (outer diameter * inner diameter * thickness) Surface color: enamel black Surface luminescence: 240,000 / KG Swiss BGW9 super luminous powder, blue light Surface size: 29.50 * 29.00 * 29.00 * 0.4mm (wire hole * surface diameter * opening surface * thickness) Hand craftsmanship: face-stitched needle blue luminous Dial luminous: 240,000 / KG Swiss BGW9 super luminous powder, blue light Pointer size: 7 * 11 * 11 (hour hand * minute hand * second hand length) Waterproof level: 200 meters waterproof / diving [can wash hands, swim, dive, meet all daily waterproof requirements] Packing standard: professional waterproof plastic box packaging