The Casio GM-2100SS-1AER watch combines a 44.4mm octagon shaped stainless steel case and a orange plastic strap with a traditional buckle. It has a silver dual display dial with luminescent hands, and a date display which is protected beneath mineral crystal glass. Power is generated by the quartz movement. Other features include an alarm and a back light. This model also has a water resistance of up to 200 metres. Accuracy +/- 15 seconds per month Alarm function Hourly time signal: The watch beeps very hour on the hour Automatic calendar Once set, the automatic calendar always displays the correct date. Countdown timer Date and weekday display Display illumination Auto Light: The watch dial will illuminate automatically when you tilt your wrist towards you. Once activated, this feature will automatically deactivate after six hours. LED light selectable illumination duration (1.5 seconds or 3 seconds) Hand shift function With a push of a button, hands move away to permit free visibility. Magnetic resistance The case has been specially mounted to be shielded from magnetic fields. Shock-resistant Shock-resistant construction protects against impact and vibration. Stopwatch function World time function Displays the current time in major cities and specific areas around the world.