This high quality watch has an Eco-drive technology (Recharged by any light source; no need for ever a battery) -The watch has a calendar function: Date, Solar Powered, Luminous Hands, Luminous Numbers, Screw Down Crown, Turnable bezelHigh quality 21 cm length and 20 mm width Green Silicone strap with a BuckleCase diameter: 44 mm,case thickness: 11 mm, case colour: Grey and dial colour: GreenWater resistant: 20 bars -Weight: 94 g