Dimensions
Size comparison
T-Rex 3GBD-300
| T-Rex 3 | GBD-300 | Difference | |
|---|---|---|---|
| Case size | 48.5 mm | 49 mm | −0.5 mm |
| Thickness | 13.8 mm | 14.9 mm | −1.2 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is T-Rex 3 better than GBD-300?
- AMOLED / OLED displayYes · GBD-300: No
- Thickness13.8 mm vs 14.9 mm+8%
Why is GBD-300 better than T-Rex 3?
- Water resistance10 ATM vs 20 ATM2×
Specifications
Side by side
| Design & durability | ||
| Case size | 48 mm | 49 mm |
| Weight | 68.3 g | — |
| Thickness | 13.8 mm | 14.9 mm |
| Height | 48.5 mm | — |
| Width | 48.5 mm | — |
| Case material | Stainless steel | Plastic / polymer |
| Lens / cover glass | Gorilla Glass | Mineralglas Mineralglas |
| Strap material | — | Kunststoff, Resin |
| Water resistance | 10 ATM | 20 ATM |
| Water rating (maker) | — | 200 m / 20 bar / 20 ATM |
| Display | ||
| Screen size | 1.5″ | — |
| Display technology | AMOLED | LCD |
| Panel | AMOLED | LED |
| AMOLED / OLED display | Yes | No |
| Touchscreen | Yes | — |
| Resolution (width) | 480 px | — |
| Resolution (height) | 480 px | — |
| Pixel density | 322 ppi | — |
| Battery | ||
| Battery life (smartwatch mode) | 27 days | — |
| Battery saver mode | 40 days | — |
| Battery capacity | 700 mAh | — |
| Charging | Magnetic charging base | — |
| Health sensors | ||
| Optical heart rate | Yes | — |
| Blood oxygen (SpO2) | Yes | — |
| Temperature sensor | Yes | — |
| Sleep tracking | Yes | — |
| Sensors | — | accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Dual-band GPS | Yes | — |
| Offline maps | Yes | — |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| Sport profiles | 177 | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.2 | 4 |
| Smart features | ||
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Platform | ||
| Platform | Proprietary | — |
| Works with | iOS, Android | — |
