These G-SHOCK Master of G “GRAVITYMASTER” GR-B200 models pack flight mission essential functions into a tough and rugged carbon core guard structure.A high-strength, highly weather-resistant carbon core guard structure protects the module with a resin case reinforced with carbon fibers. This, combined with world-renowned G-SHOCK shock resistance, creates a structure that is also highly vibration resistant.The bezel is made up of three layers of resin with carbon fiber inserts. The top layer is semi-transparent to reveal the carbon material inside. The three buttons on the right side of the watch are arranged in a way that makes them resemble a helicopter control stick, while also contributing to ease of operation. More Details The Quad Sensor system of these models uses compact sensors that make it possible to pack compass, altitude/barometer, and temperature measurement capabilities, along with an accelerometer that keeps track of your step count, into a compact configuration. This makes it easy to keep tabs on the natural environment around you and to maintain logs of your activities for comprehensive flight mission support. Case / bezel material: Carbon Resin Band Neobrite Vibration resistant Shock Resistant Mineral Glass / Spherical Glass 200-meter water resistance Double LED light Mobile link (Wireless linking using Bluetooth®) Digital compass Altimeter Barometer Thermometer Step count using a 3-axis acceleration sensor: 0 to 999,999 step count display range Power Saving: Auto sensor sleep state entry after fixed period of non-activity World time Sunrise, sunset time display Sunrise time and sunset time for specific date 1/100-second stopwatch Countdown timer 5 daily alarms Hourly time signal Hand shift feature Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: Hour, minute, second, am/pm, month, date, day Accuracy: ±15 seconds per month (with no mobile link function) Approx. battery life: 2 years on CR2025 Size of case / weight: 63×54.1×18.3mm / 80g Guarantee Scarce & Co is an Official Casio Authorised Dealer of Casio products. Our Casio products are brand new in original packaging and guaranteed to be authentic. Include 2 Year Casio AU Warranty, 1 Year International Warranty.