Set contents: Body box instruction manual Waterproof specification: 20 ATM water resistant function 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 the toughness watch G-SHOCK which continues to evolve insatiably in search of strength the tough structure remains the same and waste is eliminated. Introducing a downsized model of the popular GA-2100 which had a simple and thin design. - The base model GA-2100 is a thinner model that inherits the octagonal shape of G-SHOCK's first model DW-5000C.The flat face and simple bar index create a simple yet solid impression. - The coloring is matte black and white that fits in any fashion - Glittering metallic bar index enhances texture - Introducing a model that can be used regardless of the scene you wear・ Impact resistant structure・ 20 ATM water resistant function・ Needle retract 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: Time display of 48 cities (31 time zones with daylight saving time setting function) + UTC (Coordinated Universal Time)・ Stopwatch (1/100 second (less than 1 hour) / 1 second (1 hour or more) 24-hour counter with split)・ Timer (set unit: 1 second maximum set: 24 hours measured in 1 second units)・ 5 time alarms・ Time signal・ Fully automatic 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 part (super illuminator afterglow function afterglow time switching (1.5 seconds) With (seconds / 3 seconds)