Seiko Men's Kinetic Two-Tone Watch. Kinetic technology and automatic power generator keeps this watch wound and ready-to-go. Seiko Kinetic technology - Never Needs a Battery - powered by energy from the motion of your wrist. The attractive gray dial features a calendar readout and Lumibrite hands and markers. Mfg. Style #: SKA192 Brand: Seiko Gender: Men's Band Material Stainless Steel with Gold Tone Accent Band Length: 8 inches Band Width: 22 mm Clasp Type: Deployant Clasp Movement: Kinetic Dial Color: Gray Crystal: Hardlex Mineral Case Material: Stainless Steel with Gold Tone Accent Case Diameter: 40mm Case Thickness: 11mm Caseback: Stainless Steel Calendar: Date Display At 3:00 Water Resistant Depth: 100 meters | 330 feet Weight: 158.8 grams Additional Features: Seiko Kinetic technology - never needs a battery due to watch being powered by energy from motion of wrist.Energy Storage - up to 6 months. Residual energy indicator track on dial - shows current power storage level.Lumibrite Hands and Markers - night-time visibility. Warranty: 3 Year Seiko Mfg. Limited Warranty