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 Radio Controlled Solar Powered Worldtime Luminous Hands High quality 21 cm length and 21 mm width Silver Stainless steel strap with a Fold over with push button clasp Case diameter: 43 mmcase thickness: 10 mm case colour: Silver and dial colour: Blue Water resistant: 10 bars -Weight: 130 g The watch is delivered in an original gift box and has a warranty of 2 years Band width: 21.0 millimeters; Case diameter: 43.0 millimeters; Water resistance depth: 100.0 meters