| Garmin Forerunner 45/45S | |
 | |
| Tech specs | |
| Size | Small: 39.5 x 39.5 x 11.4 mm Large: 42 x 42 x 11.4 mm |
| Material | Lens material: chemically strengthened glass |
| Charging | Yes |
| Battery | Lithium-ion |
| Battery life | Smartwatch Mode: Up to 7 days GPS mode: Up to 13 hours |
| Water-resistance | 5 ATM |
| Weight | Small: 32 g Large: 36 g |
| Sensor | GPS/GLONASS/GALILEO, accelerometer, heart rate |
| Display | 208 pixel diameter; sunlight-visible, transflective memory-in-pixel (MIP) |
| Screen size | 1.04" (26.3 mm) diameter |
| Colors | Iris, White, Black, Lava Red |
| Other | PLATFORM: Home Grown OS PROCESSOR: Unknown MEMORY: 200 hours of activity data CONNECTIVITY: Bluetooth |
| Activity tracking | |
| Steps | Yes |
| Distance | Yes |
| Calories burned | Yes |
| Activity | Yes |
| Floors | |
| Sleep | Yes |
| Heart rate | 24/7 |
| Stress & recovery | Yes |
| Pulse Ox | |
| Respiration rate | |
| UV exposure | |
| Skin temperature | |
| Galvanic skin response | |
| Hydration level | |
| Calorie intake | |
| GPS | GPS/GLONASS/GALILEO |
| Running features | VO2 max estimate, cadence, GPS-based distance, time and pace, run workouts, foot-pod compatible |
| Swimming features | |
| Other | - VO2 Max - Body Batter Energy Monitor - Incident detection |
| Non-fitness functions | |
| Smartphone notifications | Yes. |
| On-board music storage | |
| Connected pay | |
| LTE | |
| Links | |
| Affiliate link* | Amazon | Garmin |
| Read more | Article |
**All tech specs and images on this page come from manufacturers. These may change over time as manufacturers sometimes update their devices. While we cannot guarantee absolute accuracy of information on this page, we promise to review this content regularly and do our best to bring you the most up-to-date information. To be absolutely sure of tech specs of a particular device, we recommend checking the manufacturer’s website.