KEY FEATURES – MASTER SERIES CARBONOX™+ Case Built-in & External Compass Attachment Turning Bezel with cardinal directions The four cardinal directions correspond to the following degrees of a compass: North (N): 0° = 360° East (E): 90° South (S): 180° West (W): 270° Chronograph Functionality Sapphire Crystal Glass 30ATM Water Resistance Series BEAR GRYLLS SURVIVAL 3740 MASTER SERIES Model 3741 Movement (technology) Swiss Quartz Size of case diameter 45 mm Case Material CARBONOX Case Bezel Uni-directional rotating Crystal/Glass material Sapphire crystal, anti-reflective coating Strap/Bracelet material Genuine rubber Water resistance (m/ft/atm) 300 / 1000 / 30 Case Height 14 mm Weight 98 g Illumination Luminox self-powered illumination, constant glow for up to 25 years in any light condition