The Casio ProTrek Analog-Digital PRJ-B001B-1D is a revolutionary outdoor timepiece designed for the lightest, most comfortable trekking experience. This model introduces the innovative Rotary Guard Bezel, which allows you to switch between a stylish angular design that covers buttons and a rounded mode that uncovers them for easy access during activity. This watch is powered by Tough Solar technology, ensuring reliable operation without battery changes, and features Bluetooth Smartphone Link for automatic time adjustment and trek logging. The case measures a compact 46mm in diameter and is constructed from eco-friendly Bio-based Resin. The dial is a hybrid Analog-Digital display (black with positive LCD) featuring high-visibility hands and a unique carabiner-inspired inset dial. A standout feature is the Bungee Cord Cloth Band, inspired by outdoor gear, which offers a breathable fit and can be easily fastened over heavy outerwear. With a water resistance rating of 100 meters (10 Bar) and low-temperature resistance (-10℃), the PRJ-B001B-1D is the ultimate companion for ultralight hiking and long trails.