Product DescriptionThis stylish Citizen men?s Chandler watch is ideal for an active lifestyle. For a rugged look and a comfortable fit, Citizen military watches fit the bill, with a day-date indicator, luminous hands, a 37-mm screw-back case, and 100M WR. The black dial provides a backdrop for simple Arabic numerals and is housed in a stainless-steel case along with a woven green strap with patterned stitching and a buckle clasp. Our watches for men feature Eco-Drive technology-powered by light, any light-meaning our watches never need new batteries. The perfect choice for an adventure, this timepiece is in it for the long haul. For more than forty years, Citizen?s proprietary Eco-Drive technology has served as the prime example of how the brand is dedicated to the world and to making its environment a better place. A simple yet revolutionary concept, Eco-Drive harnesses the power of light from any natural or artificial light source and converts it into energy, eliminating the need for battery replacement, by using renewable energy to keep Citizen Eco-Drive watches for men running forever. For over 100 years, Citizen, a pioneer in watchmaking and innovative technology, has promoted excellence and creativity with a deep-rooted respect for craftsmanship.Amazon.comYou will never run late with this men's sporty, Eco-Drive timepiece. From the stainless steel case, green canvas strap and 12/24 hour time indicator, the bold details never end. Additional features include a day/date indicator and water resistance to 100 meters.To set the time *(refer to full-setting instructions here: Manual ):Stop the second hand by pulling the crown out to the 2nd click (time setting position).Turn the crown to set the time.The watch will start after the crown is firmly pushed back into its normal positionTo set the Calendar*:Pull the crown out to the first click (calendar setting position).Set the desired date by turning the crown counterclockwise.Set the desired day of the week by turning the crown clockwise.After you have set the calendar, be sure to press the crown back to its normal position*Do not adjust the calendar when the watch is reading between 9:00 pm and 4:00 am, otherwise the movement may become damaged and the calendar may not change correctlyThe Citizen StorySince its foundation in 1930, CITIZEN has promoted a multi-cultural mindset that fosters excellence and creativity. The very name of the brand conveys a deep respect toward craftsmanship and considered as familiar by citizens the world-over. So as a ?citizen? of the world, we bear the responsibility to help cultivate a culture of positive change and on-going evolution through our craft. We take that mission seriously and steadfastly welcome what the future may bring.As a true manufacture d?horlogerie, CITIZEN integrates a comprehensive manufacturing process from creating individual components to a watch?s final assembly. It?s an artisan?s approach to watch making based on pushing forward the boundaries of technology and leveraging our experience toward exploring new possibilities.One pivotal technological breakthrough was the development of a light-driven watch. CITIZEN pioneered this engineering innovation well ahead of other watch manufacturers as early as 1976, which led to the launch of the highly acclaimed Eco-Drive in 1995. Utilizing electrical power converted from virtually any light source, this extraordinary innovation changed forever the way watches could be powered. Eco-Drive eliminated the need to ever replace batteries, which made it especially beneficial to areas where such specialist batteries were not obtainable. This leveled the field for citizens of virtually every country to be able to experience unrestricted joy of wearing and using a CITIZEN watch.The product development policy, ?The Fusion of Technology and Beauty,? remains a constant motivation for us to merge cutting-edge technology with perfection of design beauty,