Casio G-Shock GBA-900UU-3AER Watch

The Casio G-Shock GBA-900UU-3AER is a rugged, feature-rich sports watch designed for active lifestyles. Part of the G-Squad series, it combines G-Shock’s renowned shock resistance with modern fitness tracking capabilities. The watch features a hybrid analog-digital display housed in a durable green resin case measuring 51.3 × 48.9 × 16.6 mm and weighing just 61 grams. Its mineral glass face and 200-meter water resistance make it suitable for both intense workouts and aquatic activities. The dual LED Super Illuminator ensures visibility in low-light conditions, while the comfortable, breathable strap is designed for extended wear.

Equipped with Bluetooth® connectivity, the GBA-900UU-3AER syncs with the G-SHOCK MOVE app to provide automatic time updates, step tracking, and access to training data. It includes a built-in accelerometer for tracking steps, distance, and calories burned, and can calibrate distance measurements using your smartphone’s GPS for improved accuracy. Additional features include a 1/100-second stopwatch with 50-lap memory, interval timers, five daily alarms, and a full auto-calendar valid until 2099. The watch operates on a CR2025 battery with an approximate two-year lifespan, offering smart functionality without the need for frequent charging.