Movement Type: Quartz Movement Movement model: Japan Miyota 2115 Movement function: 3 needles/calendar, Japanese original battery, super long battery life of 4 year Battery model: SR626SW Case Material: 316L Stainle Steel Case proce: brushed + polished Bottom cover material: 316L stainle steel Bottom cover type: Screw-in solid bottom cover Case Diameter: 41mm (excluding head) Case length: 48mm (total length up and down) Shell thickne: 13mm (including lens and bottom cover) Case ear position: 20mm (where the case and strap are connected) Watch weight: 163g (including steel strap) Watch length: 228mm (total watch length/circumference) Strap Material: Stainle Steel / Rubber Band Mirror material: mineral gla Gla type: convex crystal mineral gla Mirror Mirror Coating: Anti-Glare Blue Coating Mirror mirror size: 30.5*2.5mm (diameter*thickne) Crown Type: Screw-in crown Crown size: 7.00mm (diameter) Bezel Material: Ceramic Baffle function: one-way rotation Luminous Bezel: 240,000/KG Swi BGW9 Super Luminous Powder, Blue Light Frame size: 37.98*30.60*2.00mm (outer diameter*inner diameter*thickne) Surface Color: Black/Green/Blue Surface Glow: 240,000/KG Swi BGW9 Super Glow Powder, Green Glow Surface size: 29.50 * 29.00 * 29.00 * 0.4mm (wire hole * surface diameter * opening surface * thickne) Hand craft: Polished electroplated white steel C3 emits green luminou Dial Luminous: 240,000/KG Swi C3 super bright powder with green glow Hand size: 7*11*11 (hour hand*minute hand*second hand length) Waterproof grade: 200 meters waterproof / Exhaust valve: none Warranty period: three years free warranty Packaging standard: profeional waterproof plastic box packaging Watch maintenance knowledge 1.SHOCKS: accidental collision should be avoided. 2.CHEMICAL PRODUCTS: "avoid direct touching with solvents, detergents, perfumes, cosmetic products etc., since they may damage the bracelet, the case or the gaskets." 3.CLEANING: for metal bracelets and for all cases, use a toothbrush with soapy tap water and a soft cloth for drying. 4.LEATHER STRAP: (1)Avoid touching with water and dampne to prevent discoloration and deformation. (2) Avoid prolonged exposure to sunlight to prevent the colour from fading. "(3)Do not forget that leather is permeable! Therefore avoid contact with greasy substances and cosmetic products. It is not advisable to clean your strap with leather cleaners."