OLEVS 6681 Women Multifunctional Hollow Waterproof Mechanical Watch1. Movement: quartz movement 2. Strap: genuine leather strap 3. Case: Alloy 4. Waterproof: 30m life waterproof 5. Diameter: 36mm 6. Thickness: 13mm 7. Watch circumference: steel strap 16cm, leather strap 22cm 8. Double sided hollow, the internal operation of the movement can be seen from the front and back 9. High hardness coated mirror surface, scratch resistant and wear resistant, lasting as new 10. The sealing ring is deeply waterproof and enhances