MTMs Hypertec Chrono 3 watch is intricately designed and features strong, durable components, such as a stainless steel case, locking, double O-ring sealed crown, and scratch-resistant glass. These materials allow the watch to work up to 660 feet/200 meters under water without missing a beat. At night, the watchs super luminous hands glow for easy readability. Featuring a 12Hr Stop watch.