MSTIANQ TYW-G Luxury Watch for Women - Fashion & Waterproof。The first time you wear this watch, it will need to be wound to obtain a sufficient power reserve. Keep the crown in the normal position and turn it clockwise 30 to 40 times for at least 8 hours a day Exquisite Size: OLEVS Mechanical Women\'s Watch is a luxurious and fashionable diamond watch with exquisite craftsmanship. The dial also features a tourbillon, a stopwatch, and a moon phase dial Mirror Diameter 1.25 Inches(32 mm),Case Thickness 0.47 Inches(12 mm),Band Length:7.08 Inches (180 mm), The length of the watch can be adjusted, Weight 86 g(3.03 ounces), Water Resistant To 30 m (100 Ft) When you need your watch to luminous,Please Illuminate the Watch Under the Strong Light for 30-40 Seconds to Activate the Luminous Function.Giving you a new visual experience at night Waterproofing: Suitable for daily use, can be kept on when washing hands, showering and bathing. Splash;rain resistant. Not suitable for swimming, snorkelling and water related work