The Casio G-Shock Mudmaster Twin Sensor Duo watch face is marked with large Arabian numerals 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. Case/bezel material – resin/stainless steel Resin band Mineral glass LED backlight (Super illuminator) Digital compass Thermometer function World time (31 time zones) 1/100-second stopwatch Countdown timer 5 daily alarms Low battery alert Hourly time signal Full auto-calendar (to the year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping Mud resistant Shock resistant Up to 200m water-resistant The Casio G-Shock Mudmaster Twin Sensor Duo watch’s mud resist construction helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge. Multiple gaskets are used on the pipes that guide buttons and shafts, which keeps mud out. These pipes not only act to protect buttons from impact, they also enhance button operation. In addition, Twin Sensor capabilities provide instant access to direction and temperature information when needed under tough conditions. 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 chequered surface for surer operation and the overall design is tough and rugged.