MOVEMENT TECHNOLOGY: B620 Eco-Drive Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries. CASE WIDTH (MM): 43 LUG WIDTH (MM): 15 BAND TYPE: Strap, Leather CASE MATERIAL: Rose Gold-Tone Stainless Steel CRYSTAL: Sapphire Crystal, Superior scratch resistance and hardness CLASP: Deployment Clasp with Push Buttons DIAL: Black WATER-RESISTANCE: WR50/5Bar/166ft [Still Water Swimming]