| Polar H9 | |
 | |
| TECH SPECS | |
| Size | Elastic strap |
| Charging | Replaceable battery |
| Battery | CR 2025 |
| Battery life | 400 hours with BLE, ANT+ and 5 kHz transmission active |
| Water resistance | up to 30 m |
| Weight | Sensor 21 grams, strap 39 grams |
| Sensor | Heart rate sensor |
| Connectivity | Bluetooth (one simultaneous connection), ANT+ |
| Internal storage | No |
| METRICS | |
| Heart rate | Yes |
| Heart rate variability | Yes |
| Running metrics | Keeps track of your heart rate with multiple target zones, calories burned, steps taken and distance. |
| Swim statistics | Transfers heart rate information while swimming with products which support 5 kHz transmission |
| Other | Compatible with indoor gym equipment GoPro connectivity Choose your favorite activity from 100+ sport profiles and get real-time voice guidance while you train. |
| LINKS | |
| Affiliate link* | Polar |
| Read more | Review |
**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.