Technical amendments and errors excepted. The sizes in figures do not correspond to the original sizes. Amongst the many functions featured on the watch are 5 daily alarms, a day and date display,a hand shift function and a stopwatch function.

Perfect for free diving without scuba gear: the watch is water resistant up to 20 bar according to ISO 22810. The case measures 49.3 × 44.4 × 11.8 mm, striking a balance between a comfortable fit and a noticeable presence on the wrist. The dial of the GM2100B-3A showcases a captivating and comfortable green resin band. It ensures a stylish and secure fit while adding a touch of vibrancy. The green and silver stainless steel watch contrasts with the octagonal shape for a classic appeal. For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. They The time can be set to the nearest second and up to 24 hours in advance. The case of the watch is coated by the so-called "ion plating" process consuming and offers the advantage of increased scratch resistance.

The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments.

A luminous coating provides long-term illumination in the dark after only a short exposure to light.The combination of stainless steel and glass fiber reinforced resin supports the stability of the watch and provides a better wearing comfort. Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties. The Casio GM-2100B-3AER has LED Light, which make it easy to read even in poor lighting conditions.