Garmin Forerunner 255
- Screen 1.1 inch MIP | 1.3 inch MIP
- Battery life up to 14 days
- Water resistance 5 ATM (50 metres)
- Sensors GPS/GLONASS/GALILEO, compass, barometric altimeter, accelerometer, thermometer, heart rate, Pulse OX, GPS
- Date June 2022
Specs
General
| Physical size | 255 (41 x 41 x 12.4 mm) | 255s (45.6 x 45.6 x 12.9 mm) |
| Material | Lens material: Corning® Gorilla® Glass 3. Bezel and case material: fiber-reinforced polymer |
| Charging | USB |
| Battery | Rechargeable lithium-ion |
| Battery life | 255 (14 days in smartwatch mode, 6.5 hours GPS + Music, 30 hours in GPS mode). 255s (12 days in smartwatch mode, 6.5 hours GPS + Music, 26 hours in GPS mode) |
| Water resistance | 5 ATM |
| Weight | 39g | 49g |
| Display type | Sunlight-visible, transflective memory-in-pixel (MIP). Touch-enabled. Solar option. |
| Display size | 1.1" (27.9mm) | 1.3" (33mm) |
| Display resolution | 218 x 218 pixels | 260 x 260 pixels |
| Color options | 255 (Slate Grey/Black, Dark Blue/Black), 255s (Light Grey/Black, Dusty Pink/Black), 255 Music (Black, Stone white/black), 255s Music (Black, Stone white/black) |
Sensors
| Accelerometer | Yes |
| Barometric altimeter | Yes |
| Compass | Yes |
| Galvanic skin response | No |
| Geomagnetic | No |
| Gyroscope | Yes |
| Optical heart rate | Yes |
| Electrical heart rate | No |
| SpO2 | Yes |
| Temperature | No |
| GPS | Yes |
| GALILEO | Yes |
| GLONASS | Yes |
| QZSS | No |
| Beidou | No |
| Ambient light sensor | No |
| Vibration motor | Yes |
| Microphone | No |
| Speakers | No |
Health & activity tracking
| Steps | Yes |
| Distance | Yes |
| Calories burned | Yes |
| Sports tracking | Yes (30+) |
| Floors | Yes |
| Sleep | Yes |
| Heart rate | Yes |
| Stress | Yes |
| Blood oxygen | Yes |
| Respiration rate | Yes |
| UV exposure | No |
| Skin temperature | No |
| Hydration level | No |
| HRV | No |
| ECG | No |
| Calorie intake | No |
| Blood pressure | No |
| Glucose | No |
| Other | HRV status, Running power on the device (with compatible accessory), Competition widget, Multi frequency reception, Morning report |
Daily smart features
| Smartphone notifications | Yes |
| Smartphone music control | Yes |
| On-board music storage | Yes (500 songs optional) |
| Connected pay | Yes |
| Cellular | No |
| Connectivity | Bluetooth, ANT+ |
| Operating system | Proprietary |
| Memory | 200 hours of activity data |
Disclaimer Note
These technical specs are correct to the best of our knowledge at the time of publishing.
