Casio G-Shock GravityMaster GA-1100-2B Twin Sensor Watch. This new model features a new type of World Time function that is designed with international pilots in mind. In addition to the time in your current location, which is indicated by wide hour and minute hands, a second time can be indicated by the dial at 9 o?clock. Other pilot-friendly functions include a large button at 9 o?clock that can be used to trigger a 60-second continuous bearing or temperature sensor reading with a single press. Also, a high-luminosity LED display light enables reading of display information even in the dark. All of this and much more makes this new GRAVITYMASTER model the logical watch of choice as aviation watches. Case / bezel material: Resin / Stainless steel. Resin Band. Neobrite. Shock Resistant. Mineral Glass / Spherical Glass. 200-meter water resistance. LED light (Super Illuminator). Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow. Digital compass (NORTH): Hand indication of north (60 seconds continuous measurement), Measures and displays direction as one of 16 points, Bidirectional calibration, Magnetic declination correction. Thermometer. World time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off. Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.). 1/100-second stopwatch. Countdown timer. 5 daily alarms. Hourly time signal. Full auto-calendar (to year 2099). 12/24-hour format. Button operation tone on/off. Regular timekeeping: World time hour and minute, Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), Digital: Hour, minute, second, pm, month, date, day. Size of case : 50.8?52.1?16.9mm. Total weight : 88g.