Gute Casual Mens Black Steel Skeleton Automatic Mechanical Coated Glass Wristwatch Keeping Accurate Times: Work by the movement of your wrist as you wear it and wind mainspring manually, not need battery, exquisite workmanship keep the time precise Luxury Mechanical Watches: black stainless steel bracelet link band provides comfortable wearing experience Unique design: Upgrade design with luminous hands offer extra use at night and blue coated crystal on case adds fashion and character Water Resistance: 1ATM water-proof for daily use such as sweating / hand wash/rain day, no suitable for swimming / diving / water-related Warranty: GuTe offer our customers a 12-month 100% Money Back Guarantee. If your wristwatch has any quality issues, please contact our customer service immediately. We will definitely help you solve it You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it! Case Diameter: 4.5 cm Case Thickness: 1.3 cm Band Width: 2 cm Movement: Automatic movement Band Materials: Stainless steel Style: Classic skeleton watches<br> Manual - Slowly turn the crown clockwise (in the 12 oclock direction) to wind the mainspring ( please manually wind the mainspring for your first use or when it stop work ) Automatic - wear on your wrist and keep the watch move to wind the mainspring Pull out the crown to the first click to set time counter clockwise ( in the 6 oclock direction ) Please keep the watch away from magnet