This Casio G-Shock GD-010-1ER Classic oriented men's watch has resin and carbon circular bio-based case. Carbon core guard structure, shock resistant. The strap is black bio-based resin. The crystal is mineral, the movement is quartz (ten years) and the digital display. Water resistance: 20 ATM. Diameter: 54.9 mm. Weight: 65 gr. Functions: World time. Various hours (4 different cities). World time With 31 time zones (48 cities + coordinated universal time), activation/deactivation of daylight saving time and change of local city/world time. 1/100 second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: elapsed time, fraction of time and time of the first and second place. Countdown timer Unit of measurement: 1/10 second Countdown range: 24 hours Countdown start time setting range: Between 1 second and 24 hours (1 second increments, 1 minute increments and 1 hour increments). Five alarms (daily or single). Time signal. LED backlight (super-illuminator) Automatic light switch, selectable illumination duration, white luminosity. Full automatic calendar (up to the year 2099). Button press tone activation or deactivation. Accuracy: ±15 seconds per month. Other options: 12-hour and 24-hour format. Standard time display: hour, minute, second, p.m., month, date and day. Three year warranty. Enjoy your Casio G-Shock Classic watch.