It all started with a developer's passion for creating a watch that would not break even if dropped and a reckless challenge that overturned the common sense of the time. - Over 200 prototypes have been repeated and about two years have been spent and the shock-resistant structure has been completed. - It is the birth of technology to play the core of toughness - Since then G-SHOCK has continued to evolve endlessly - Structure material function - Pursuing further toughness in every aspect - From the master of G series Mad Master that is supposed to be used in the extreme land where rubble and earth and sand are piled up and scattered a model equipped with a dustproof and mudproof structure and equipped with twin sensors will appear. - When engaging in missions at rescue sites it is possible to measure the azimuth that is important information with a single push of the large button at 3 o'clock. - Button guard cylinder structure that enables dustproof and mudproof performance - A cylindrical pipe that protects the button and a gasket built into the button prevent fine sand and mud from entering. - In addition the cylindrical pipe plays a role in reducing the impact received by the buttons and enhancing operability and is designed to withstand tough use. - Wide hour and minute hands and a large Arabic numeral index at 12 3 6 and 9 o'clock to enhance visibility - A disc needle with a sprocket motif is used for the mode display part and the texture of the band is designed to be anti-slip resulting in a design full of military taste everywhere - A mad master who supports tough guys on the harsh missions on land・ Shock-resistant structure・ Dust-proof / mud-proof structure・ 20-atmosphere waterproof function・ World time: 48 cities (with 31 time zones and daylight saving time setting functions) + UTC (universal coordinated time) time display Measure azimuth angle (0 to 359 °) continuous azimuth measurement (20 seconds) bearing memory (one memory that shows azimuth angle and recorded direction) magnetic declination correction function azimuth correction function / temperature Measurement function (measurement range: -10 to 60 ° C) ・ Stopwatch (1/100 second 24 hours total with split) ・ Timer (set unit: 1 minute maximum set: 60 minutes measured in 1 second units) ・ Five alarms (with only one snooze function)・ Time signal・ Battery warning function・ Full auto calendar・ 12 / 24-hour display switching・ Operation sound ON / OFF switching function・ Auto high brightness LED light (afterglow function (With afterglow time switching (1.5 seconds / 3 seconds)) Model Number: GG-1000-1A5JF