ABOUT S2SQURE S2SQURE is committed to creating innovative, high-quality and cost-effective full-automatic mechanical watches. The design is especially for men. Practical function This is a mechanical watch with automatic chain. It uses the automatic rotation of the movement to swing left to right to generate power to drive the spring. The movement of the wrist will wind up the watch automatically in daily wear. It doesn’t need batteries. But if you haven't worn it for a long time, you have to twist the middle button clockwise to wind it up. It also has waterproof and luminous function. Read more It has multi-functional dials with week, date, day and night. Luminous pointers allow you to see the time clearly at night. Unique design looks simple and high-grade, can also meet your various needs. The original imported mechanical movement is adopted, hundreds of moving parts combine the mechanical complexity and precision without battery. You will be surprised to see the swing of movement. It adopts stainless steel strap and high hardness coated glass mirror, delicate and beautiful. Therefore, it has practicability and decoration with fine workmanship and beautiful appearance. Read more Package list The package contains oneS2SQURE mechanical watch, an English manual, and a brand high-end gift watch box. Detailed information Size Dial diameter : 41mm Thickness :13mm Strap : 17cm in length and 20mm in width. The total length of the dial and strap is 21cm. It is suitable for men with wrist circumference less than or equal to 21cm. Read more There are ten colors, which are not only suitable for office work, but also for holidays. They can meet the collocation of different styles and can also be used as gifts. Usage tips 1、Use the top button on the right side of the watch to adjust the week. You can pull out and twist the middle button on the right to adjust the hour and minute hands. The button of the bottom can be used to adjust the date. 2、When adjusting the time, it is necessary to distinguish between day and night. It is day when you see the sun. It is night when you see the moon. 3、Do not adjust the calendar and week from 8 p.m. to 6 a.m. to avoid damaging the watch. 4、There is no need to wind up the watch for daily wear. But if you haven't worn it for a long time, you have to twist the middle button clockwise to wind it up. 5、Avoid placing the watch next to electrical appliances or magnetic objects that generate magnetic fields.