1. Automatic winding mechanical movement allows you to wear your watch at any time. 2. Advanced manufacturing technology 3. All stainless steel buckle 4. Comfortable leather strap 5. Environmental protection IPS plating box 6. Use environmental IPS bronze plating to observe the crown 7. Stainless steel and transparent back cover, high-tech laser logo 8. 3ATM waterproof performance to meet your daily needs Movement: precision machinery and automation Case material: stainless steel Weight: about 75 grams Case diameter (cm): 4.3cm Case thickness (cm): 1.5cm Strap material: leather Belt length (cm): 25.5cm Bandwidth (cm): 2.1cm Band color: black, brown Band adjustable: yes Waterproof: 3ATM waterproof (not suitable for swimming) Package Included: 1 X watch How to use: Mechanical watch, powered by manual winding spring or self-winding (no battery required). 1. When wearing for the first time, turn the button on the side of the watch until the watch is full. 2. With a light press of the button, you can adjust the time and then press the button. 3. If you leave it for a long time, shake it for a few minutes, then circle a few more times. At this time, it will work normally. 4. If you still have any questions, please contact us first. This mechanical watch allows for a time of + - 1 minute every 24 hours. This is the international mechanical watch rules.