The Nixon Regulus MK-1 is a durable and rugged digital watch designed for outdoor and military use. It features a shock-resistant case, a dual-time display, a countdown timer, and an LED backlight, among other functions. The watch is water-resistant up to 100 meters and has a battery life of up to five years. It also comes with a variety of customizable settings and a durable band that can withstand harsh conditions. The Nixon Regulus MK-1 is a high-quality watch designed for those who demand durability and functionality in their timepiece.