When it comes to reliable timepieces for adventurous men, the Citizen Promaster Sky BJ7136-00E is a top contender. This Eco-Drive watch is designed to handle extreme conditions while providing precise timekeeping, thanks to its Citizen Cal. B877 engine. With the ability to run for approximately 6 months on a single full charge, this watch won't let you down when you need it most. The watch is equipped with a range of features that help you stay on track, including flying distance and navigation calculations, dual time, and a date display at the 3 o'clock position.Whether you're diving into the depths of the ocean or exploring rugged terrain, the Citizen Promaster Sky BJ7136-00E is ready for any adventure. With water resistance up to 200 meters (660 feet), you can take this watch with you on all of your aquatic excursions. The stainless steel case and nylon strap are durable and designed to withstand even the toughest conditions, while the crystal glass provides added protection for the green dial. The lumibrite on the hands and indexes makes it easy to read the time, even in low-light situations.