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: Day-Date Solar Powered Luminous Hands Luminous Numbers High quality 21 cm length and 20 mm width Silver Titanium strap with a Fold over with push button clasp Case diameter: 41 mmcase thickness: 10 mm case colour: Silver and dial colour: Blue Water resistant: 10 bars -Weight: 90 g The watch is delivered in an original gift box and has a warranty of 2 years Band width: 20.0 millimeters Case diameter: 41.0 millimeters Water resistance depth: 100.0 meters