The Casio GM-2100M-1AER is a robust and stylish timepiece that combines a stainless steel bezel with a bio-based resin band. Measuring 49.3 × 44.4 × 11.8 mm and weighing 71 g, it offers a comfortable fit. The watch features a black dial with silver hands and indices, protected by mineral glass. It is shock-resistant and water-resistant up to 200 meters. Additional functionalities include world time across 31 time zones, a 1/100-second stopwatch, countdown timer, 5 daily alarms, and a double LED light for enhanced visibility. The GM-2100M-1AER is powered by a quartz movement with an approximate battery life of 3 years on SR726W × 2 batteries. Reference number: GM-2100M-1AER.