| Reference Ocarat | #90307 |
| Reference | GBA-900UU-3AER |
| Brand | Casio G-Shock |
| Product Type | Watch |
| Gender | Men |
| Color | Black Green |
| Material | Synthetic |
| Material Quality | Resin |
| Warranty | 2 Years |
| Length (in mm) | 51,40 |
| Width (in mm) | 48,90 |
| Thickness (in mm) | 16,60 |
| Manufacturing | Japan |
| Warranty Type | International |
| Labels and Certificates | Authorized Retailer |
| Case Shape | Round |
| Case Weight (in g) | 61,00 |
| Bezel | Fixed Resin |
| Watch Case Back | Case back secured by screws |
| Crystal Shape | Flat |
| Glass Quality | Mineral Crystal |
| Buttons | 4 Push Buttons |
| Water Resistance (in ATM) | 20 |
| Movements | Quartz |
| Calendar and Time | Dates Hours Minutes |
| Chronograph Function | Yes |
| Timekeeping and Measurement | 1/100th of a second chronometer Chronometer Chronometer - 24 hours Countdown |
| Alarm Complications | 12-Hour Alarm 24h alarm |
| Navigation and Instruments | Pedometer (step counter) |
| Display Type | Analog (hands) Digital |
| Display Specifications | Arabic Numerals Indices and railroad track Super Auto LED Light |
| Techniques and Mechanics | Multifunctions: see description |
| Bracelet Material | Resin |
| Strap Color | Green |
| Water Resistant | Yes |
| Watch Clasp | Tang Buckle |
| Lug Width (in mm) | Special - Custom Made |
| Activities | Running Swimming / Diving Technical Adventure |
| Connectivity and Display | Bluetooth |
The GBA-900UU-3AER from Casio G-Shock is part of the G-Squad Utility Color line. Its bold style is a natural fit for men. The case is crafted from carbon fiber-reinforced resin, measuring 45.50 mm wide, 48.60 mm tall, and 11.90 mm thick. Built for maximum durability, the dial is shielded by a mineral crystal that fends off scratches. Four pushers on either side of the case give you access to every function. The case back is screw-secured, and with 20-atmosphere water resistance - 200 meters - meeting the ISO 22810 standard, this watch is ready to dive.
The dial on this smartwatch is round with a black background that lets both display types shine. The analog display features two central hands showing hours and minutes, pointing to 12 baton indices. A minute track adds precision alongside the indices. The entire lower section of the dial hosts the digital display, packed with functions. At 10 o'clock, a counter provides access to additional features. The Bluetooth function lets you pair the watch with your phone, and the Super-Auto LED Light keeps the dial readable at all times. Casio G-Shock signs the piece at 3 o'clock.
- Bluetooth® Smart: the watch is equipped with energy-efficient Bluetooth® technology, enabling data exchange with a single button press. The Bluetooth® function wirelessly connects the watch to a smartphone, unlocking a wide range of highly practical features.
**- Smartphone Time**: when the wall clock is paired with a smartphone, the time is set automatically and displays the current local time anywhere in the world.
- Super-Auto LED Light: when ambient light drops, a flick of the wrist floods the dial with vivid, powerful illumination.
- Shock Resistance: the shock-resistant structure protects the watch against impacts and vibrations.
- Step Counter: the watch tracks your total step count.
- Lifelog Function
- Second Time Zone: a second local time can be set and viewed - ideal if you regularly make international calls, for example.
- 1/100-Second Stopwatch - 24 Hours: measures elapsed time to 1/100th-second precision over a maximum duration of 24 hours. An audible beep confirms the start and stop of the stopwatch.
- 50-Lap Memory: records lap times, split times, and intermediate times with date stamps for later review. Each data block contains: date, elapsed time, lap time, and split times. The memory stores up to 50 such data blocks.
- 5 Countdown Timers - 1/1 sec - 60 Minutes (with auto-repeat): this model features five independent countdown timers that sound an alert when the set time expires, then automatically restart from the preset time. Measurement capacity goes up to 60 minutes, adjustable in 1-second increments.
- 5 Daily Alarms: an audible alarm reminds you of your daily commitments at the programmed time. This model features five independent alarms, giving you the flexibility to stay on top of all your important appointments.
- Button Beep On/Off: the button beep can be disabled using the mode button. Once turned off, no beep sounds when switching between functions. However, any programmed alarms or countdown timers remain active after the button beep is disabled.
- Hand Shift Function: this function moves the hands out of the way when they obscure the time, date, or stopwatch display.
- Phone Finder: can't find your smartphone? Just press one of the watch's buttons to trigger an alarm on your phone.
- Incoming Call Indicator: when a call comes in on your smartphone, a notification appears on the watch.
- Auto Calendar: once set, the auto calendar always displays the correct date.
- 12/24-Hour Time Format: switch between 12-hour and 24-hour time display.
A quartz movement powers this timepiece, with a battery life of two years. Both the analog and digital displays on the dial run flawlessly throughout.
This watch is dressed in a dark green resin strap. Flexible for all-day comfort and tough enough for any challenge, it fastens easily with its pin buckle.
With 200-meter water resistance - 20 ATM in proper watchmaking terms - this watch is built for shallow-water diving. It handles showers, baths, pool and ocean swimming, and recreational freediving with ease. For professional scuba diving with tanks, our Ocarat watchmaking team has handpicked a selection of 30 ATM models available through a quick search on our site. One last reminder: keep your fingers off the pushers and crown during any water activity!



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G-Squad Utility Color Watch GBA-900UU-3AER
(Ref. 90307)