| Garmin Forerunner 645 Music | |
 | |
| Tech specs | |
| Size | 42.5 x 42.5 x 13.5 mm |
| Material | Plastic with silicon band, stainless steel bezel |
| Charging | Yes |
| Battery | lithium-ion |
| Battery life | Smartwatch Mode: Up to 7 days GPS mode with music: Up to 5 hours |
| Water-resistance | 5 ATM |
| Weight | 42.2 grams |
| Sensor | Accelerometer, GPS/GLONASS, compass, optical HR monitor, barometric altimeter, gyroscope, thermometer |
| Display | sunlight-visible, transflective memory-in-pixel (MIP), colour 240 x 240 pixels, Corning® Gorilla® Glass 3 |
| Screen size | 30.4 mm diameter |
| Colors | Various |
| Other | PLATFORM: Proprietary OS PROCESSOR: N/A MEMORY: 200 hours of activity data; music storage for up to 500 songs CONNECTIVITY: Bluetooth Smart, Ant+, Wi-Fi |
| Activity tracking | |
| Steps | Yes |
| Distance | Yes |
| Calories burned | Yes |
| Activity | Yes |
| Floors | Yes |
| Sleep | Yes |
| Heart rate | 24/7 |
| Stress & recovery | Stress test |
| Pulse Ox | |
| Respiration rate | |
| UV exposure | |
| Skin temperature | |
| Galvanic skin response | |
| Hydration level | |
| Calorie intake | |
| GPS | GPS and GLONASS enabled |
| Running features | VO2 max estimate, recovery advisor, race predictor, running dynamics, calculates distance for indoor workouts, personal records, virtual partner/racer, cadence, performance condition, Training Status, Training Load, Training Effect and much more. |
| Swimming features | Preloaded swim profiles, pool swim metrics (lengths, distance, pace, stroke count/rate, calories), stroke type detection (freestyle, backstroke, breaststroke, butterfly), swim efficiency (SWOLF), drill logging and more. |
| Other | - automatic rep counting in the gym - Features physiological measurements (stress score, performance condition and lactate threshold) - Find my phone and more |
| Non-fitness functions | |
| Smartphone notifications | Yes |
| On-board music storage | Yes, on-board storage for up to 500 songs |
| Connected pay | Yes |
| LTE | |
| Links | |
| Affiliate link* | Amazon | Garmin |
| Read more | Article |
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