From G-SHOCK which continues to evolve in pursuit of toughness to the TONE-ONTONE series all details are finished in one tone. The base model uses GA-2100 with an octagon bezel. This is a casual color model that is perfect for street fashion and is easy to use as an accent to your styling. ・Shock-resistant structure・20 ATM waterproof function - Needle retraction function (if the hands overlap the LCD display and are difficult to see you can temporarily retract the hands from above the LCD display)・ World time: 48 cities around the world (31 time zones daylight savings time setting function included) + UTC (coordinated universal time) time display・ Stopwatch (1/100 second (less than 1 hour) / 1 second (more than 1 hour) 24 hours total with split) - Timer (set unit: 1 second maximum set: 24 hours measured in 1 second increments)・5 time alarms/time signal・Full auto calendar・12/24 hour display switching・ Operation sound ON/OFF switching function・Double LED light: LED light for dial (with super illuminator afterglow function afterglow time switching (1.5 seconds/3 seconds)) LED backlight for LCD section (super illuminator afterglow function afterglow time switching (1.5 seconds)) seconds/3 seconds)・Battery life: Approximately 3 years *Battery life is calculated from the time of production as it is a monitor battery.