Luminox XB3723R3 Bear Grylls Survival Limited Edition Rule of 3 Data Brand Active Pro battery life: 7 years on battery life: 7 years on CR2025 Mineral Glass World time: Multi Time (4 different cities) 31 time zones (48 cities + coordinated universal time) 3mm Thickness 161g Weight Accuracy: + 15 seconds a month at normal temperature range (5°C and 60°C) Sapphire Crystal Pul Out Crown Screw Back Case Date Lumibrite Hand and Hour Markers Power Reserve Indicator 6 Months Power Reserve Tachymeter Stopwatch: Stopwatch Measures 60 Minutes In 1 5th Of A Second Increments with Split Time Capability AR Coating on inner surface Three fold clasp w push button release 100 Meters Water Resistant Swiss Quartz Movement Constant glow for up to 25 Years 42mm Case Size Stainless Steel Case Rubber Strap 14mm Case Thickness Hardened Mineral Crystal 200 Meters Water Resistant the watch comes with a removable slider on the strap showcasing the Rule of 3