Gender: Men's Movement: Swiss quartz Water Resistance: 20 bar - 200m - 660ft Case Material: Stainless steel Case-back: Screw-on External Bezel: Unidirectional rotating bezel with luminous marker at zero position Crystal: Sapphire Luminosity: Luminous hands and markers Crown: Knurled Additional Features: Date display 3-Year limited warranty Strap/Bracelet: Silicon strap Buckle: Diver's buckle and safety clasp Lug Width: 20mm Power Source: Battery Case Size: 43 mm