With this mid-size ISO351 watch from ArmourLite, you get the great features of the Valor Series watches, but a smaller case size at 39.5mm. Nonetheless the T100 Tritium hands and markers will never leave you in the dark. Illumination: Swiss-Made T100 tritium markers Functions / Features: Date display Movement: Swiss-Made Ronda 505 quartz Battery Life: 45-months Crystal: Scratch-resistant sapphire with anti-reflective coating Case Diameter: 39.5mm Case Thickness: 12mm Case Material: Carbon fiber reinforced polycarbonate Caseback: Stainless steel engraved plate fixed with 4 security screws Bezel: Unidirectional ratcheting diver bezel with a tritium elapsed minute marker Crown: Double-gasket push-in with side shields Water Resistance: 200m / 660ft / 20atm Band Material: Rubber Band Width: 20mm Band Clasp: Stainless steel deployment buckle Manufacturer Warranty: 2 years Extras: Zippered travel case with extra nylon band