This amazing racing chronograph recalls up to 20 lap times and calculates average speed. Using the very best of both analog and digital displays, this watch is easy-to-read and extremely functional.

It's simply amazing that Citizen can pack all this technology into an Eco-Drive watch. There are no batteries to replace, ever! The watch is fueled by light! Yet it has dozens of the highest technology functions and even has a LED back light Digital Display!

This watch has a 43 city world time display for instant time calculations around the world. It has a great 24 hour audible alarm. The watch has full chronograph functions. And it has a 99 minute count down timer alarm, too.

Available in either solid stainless steel or solid lightweight titanium, the watch features a bidirectional slide rule bezel for dozens of other racing calculations.

The Promaster SST is water resistant to 200 meters (660 feet) below sea level and can be safely used for diving and underwater sports.

Citizen Promaster SST Digital-Analog Chronograph Alarm 1/1000 Split Second Chronograph Chronograph Measures up to 24 Hours Split Lap Time Average Speed Calculation 20 Lap Memory   World Time in 43 Cities 124 Hour Alarm 99 Minute Countdown Timer LED Back light for Digital Display Bidirectional Rotating Slide Rule Bezel   Eco-Drive Battery Free Technology 240 Day Power Reserve when Fully Charged Requires Only 200 Hours to Fully Charge in Average Lighting 3 Day Low Charge Warning   Stainless Steel Case and Bracelet with Black Ion Plated Accents Non-Reflective Mineral Glass Crystal Water Resistant to 200 Meters (660 Feet) Bracelet features a Fold Over Clasp with Double Hidden Push Button Release DIMENSIONS: Width 45 millimeters (47.5 millimeters with crown) Large Men's Watch Depth (thickness) 13 millimeters Gem of the Day is an AUTHORIZED INTERNET DEALER: 30 Day Full "No Questions Asked" Money Back Guarantee (No Restocking Fees) Full 5 Year Citizen U.S.A. Warranty