Diameter: 43mm - Crystal: Sapphire anti-reflective coated - Crown: Bear Grylls signature orange protected crown screw in - Bezel: Fixed - Water Resistance: 100 meters / 330 feet / 10 ATM individually tested - Movement: Ronda 515 Swiss Quartz - Case: ALUMNI-NOX:AAA aerospace grade aluminum - Dial|Figures: Brown|Sand - Strap: 23mm Grey rubber strap with IP grey stainless steel signature buckle - Time date function - Constant glow for up to 25 years in any light condition