GuTe IK Colouring Mens Luxury Skeleton Rose-gold Auto Mechanical Wristwatch All Steel Work by the movement of your wrist as you wear it and wind mainspring manually, not need battery, exquisite workmanship keep the time precise Unique black stainless steel bracelet link band provides comfortable wearing experience Upgrade design with luminous hands offer extra use at night and blue coated crystal on case adds fashion and character 1ATM water-proof for daily use such as sweating / hand wash/rain day, no suitable for swimming / diving / water-related 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