This watch has an automatic watch movement ( recharged by any movement with your wrist; never needs a battery) comes with a turnable bezel-The watch has a calendar function: Day-Date Luminous Hands Luminous Numbers High quality 21 cm length and 20 mm width Silver Stainless steel strap with a Fold over clasp Case diameter: 40 mmcase thickness: 15 mm case colour: Silver and dial colour: Black Water resistant: 5 bars -Weight: 108 g The watch is delivered in an original gift box and has a warranty of 2 years