Amazon.com: OLEVS Watch Women Reloj para mujer Ultra Thin 。* [Olevs Women’s Watch] The watch uses Japanese quartz movement and high-quality battery to ensure the accuracy of the date and time. Ladies casual watch with high hardness glass and adjustable steel strap. The steel belt will not fade. Luxury crystal diamond and Roman digital dial have elegant fashion style and perfect design. * [Watch Size] The diameter: 1.3 Inches (33mm), case thickness: 0.3 Inches (8mm), length: 8 Inches (200mm), width: 0.6 Inches (14mm). The watch links can be removed and adjusted with the adjustment tool in the package box. (If the links is too short, please contact us to get a longer links.) * [FUNCTION] Waterproof to 30M (100FT); Can be used for hand washing, rain, sailing and water sports, swimming and bathing in cold water, please do not press any button underwater. How to adjust the calendar: 1. Gently pull the knob out 1 division 2. rotate up to adjust: date 3. gently pull the knob out 2 division 4. rotation adjustment: time.