Casio Men's watch G2310-1VG-Shock Collection. Solar Powered, never need to change the battery. Black Plastic Resin case and strap with stainless steel case-back. Black dial. Digital Display. 30 Page Databank. Auto-Calendar. Countdown Timer. EL Backlight with Afterglow. Water resistant to 200m.Alarm. 1/100 second stopwatch. Shock Resistant. Case measures 46mm diameter by 15mm thick. 1 year original manufacturer warranty.