The G-Shock Mudmaster Mens Watch features a mud resistant construction which helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge. A special vibration-resistant construction lets them stand up to wear while operating cutters, crushers, drills and other heavy machinery to clear way large obstacles. It features multiple gaskets that are used on the pipes for guiding buttons and shafts, which helps keep mud out. These pipes not only act to protect buttons from impact, they also enhance button operation. This watch is not only mud and dust resistant but also shock and water resistant. Illuminated Dial. This G-Shock watch features Twin Sensor capabilities that provide instant access to direction and temperature information when needed under tough conditions. The face of the watch is marked with large Arabian numerals at 12, 3, 6, and 9 o'clock for easy reading. The face is illuminated by a Super Illuminator - high-brightness auto LED light to ensure high visibility under virtually any conditions imaginable while the hands and markers are Neo-brite Luminous. Rugged Design. The band surface is processed to resemble a cloth band texture and the hour and minute hands are shaped with points that make them resemble warning markers. All buttons have a checkered surface for surer operation, and the overall design is tough and rugged. It has an easy tone on/off button operation.