• Automatic mechanical watch， self-winding， doesn't need battery， environmentally friendly
• Hollow-out design， let you see the complex structure of the watch
• Stainless steel case and band， sturdy in structure and durable to use
• Folding clasp with safety， easy to take on and off; With pressing buckle， it can effectively prevent falling down

The power of movement
Automatic mechanical watch without batteries， the motion of time pointers depend on the swing of arm， so you must wear it more than eight hours a day to keep precise time.