Citizen AT2520-89E Eco-Drive Black Chronograph Steel Men's Watch ✅Caliber No. :H500 ✅Strap: Stainless Steel ✅Water Resistant to 100m ✅Case Thickness: 12.3mm ✅Case diameter: 43.5mm ✅Case material:Stainless Steel ✅Glass: Mineral crystal ✅24hrs and Date Display ✅Chronograph ✅Eco-Drive (recharged by any light source, no need to change battery) ✅Insufficient Charge Warning Function ✅Overcharge Prevention Function ✅3 YEAR WARRANTY