Communication with compatible smartphones Impact resistant structure that is resistant to shock and vibration Hand retract function that temporarily retracts the hour and minute hands that overlap the liquid crystal display to make it easier to read the displayed data From G-STEEL GST-B300 that adopted the ever-evolving carbon core guard structure"of G-SHOCK in pursuit of toughness Introducing a model with utility colors - This time based on GST-B300 one model with different coloring and two models using carbon material for the bezel will appear. - GST-B300XB / B300XA uses sapphire glass for the windshield and carbon material for the bezel which is characterized by its light weight and high rigidity. - More robust - The bezel of GST-B300XB is treated with a new pattern due to the evolution of laminating and processing technology to create an unprecedented design. - In addition green IP is used for the case and front button and a urethane band with a green pattern is used for the band. - GST-B300B is a color based on black with a gold accent. - Gold IP is used for each button and buckle and green is used for the dial for a stylish finish. - Introducing the G-SHOCK-like rugged and playful rugged style GST-B300. ・ Impact resistant structure・ Tough solar (solar charging system)・ 20 ATM water resistant function・ Mobile link function (function interlocking by Bluetooth? Communication with compatible mobile phones)・ Needle evacuation function (If the needle overlaps with the liquid crystal display and is difficult to see the needle can be temporarily retracted from above the liquid crystal display)・ World time: 39 cities around the world (39 time zones with automatic daylight saving time setting function) + UTC (Coordinated Universal Time) time display home time city replacement function・ Stopwatch (1/1000 seconds (less than 1 hour) / 1/10 seconds (1 hour or more) 24-hour counter with split)・ Timer (set unit: 1 second maximum set: 24 hours measured in 1/10 second units)・ 5 multi-alarms (DAILY 1 TIME SCHEDULE)・ Time signal・ Battery indicator display・ Power saving function (In a dark place the display is turned off after a certain period of time and the hand movement is stopped to save power)・ Fully automatic calendar・ 12/24 hour display switching・ Operation sound ON / OFF switching function -Double LED light: LED light for dial (fully automatic light super illuminator afterglow function with afterglow time switching (1.5 seconds / 3 seconds)) LED backlight for LCD part (fully automatic light super illuminator With afterglow function and afterglow time switching (1.5 seconds / 3 seconds))・ Driving time without solar power generation from full charge: When using the function / about 6 months when in the power saving state / about 19 months * If not linked with a smartphone normal quartz accuracy (average monthly difference ± Works in 15 seconds)* GST-B300XB / GST-B300XA / GST-B300B is certified by the Radio Law of Japan. * The smartphone link function depends on the specifications of the mobile phone and the service of the carrier in the country of use and varies from person to person.