Citizen Men's JW0010-52E Eco-Drive Promaster SST Stainless Steel Watch Light powered Eco-Drive Caliber U700 Japanese-quartz movement; charges in natural sunlight or indoor light Durable, hardened non-reflective mineral crystal; case diameter: 54 mm; 1/1000 second chronograph measures up to 24 hours; split lap time; average speed calculation; 20 lap memory World time in 43 cities; alarm function; 99 minute countdown timer; Red LED backlight function Stainless steel case; black dial; rotating slide rule bezel; Screw back case Water resistant to 660 feet (200 M): suitable for recreational scuba diving