"Citizen's Eco Drive Technology merges on the fast track with Promaster's Split Second Timing (SST) to unleash a race chronograph that boasts 1/1000 second accuracy, recalls up to 20 lap times, and calculates average speed. Driver beware, one look at the Promaster SST and you're staring into the dashboard of your timekeeping thrill ride. Stainless Steel Case and Bracelet with Black Ion Plated Accents Non-Reflective Mineral Glass Crystal Water Resistant to 200 Meters (660 Feet) 1/1000 Second Chronograph measures up to 24 Hours Split Lap Time Average Speed Calculation 20 Lap Memory World Time in 43 Cities Alarm 99 Minute Countdown Timer Red LED Backlight Rotating Slide Rule Bezel 240 Day Power Reserve when fully charged (Approximately 200 Hours to fully charge in Average Lighting) 3 Day Low Charge Warning Bracelet features a Fold Over Clasp with Double Hidden Push Button Release 45mm Case Width (Approximately 1 3/4"")"