Polar Vantage M3
30 h of GPS and 53 g on the wrist, with dual-frequency GPS and maps on board. It won't take ANT+ sensors, so your strap and power meter need Bluetooth.
What the maker states
| GPS battery | 30 h, Performance training mode |
|---|---|
| Smartwatch battery | 7 days, Smartwatch mode |
| Weight | 53 g, With wristband |
| Case | 44.7 mm |
| Water rating | WR50 |
| Display | 1.28 in AMOLED, 416 x 416 |
| Satellite systems | GPS, GLONASS, Galileo, BeiDou, QZSS; dual-frequency |
| Heart rate sensor | Optical, Elixir, OHR Gen 4 |
| External sensors | Bluetooth only; no ANT+ |
| Training metrics | Training Load Pro, Energy Sources, wrist-based running power, swimming metrics |
| App | Polar Flow |