SUPREME ACCURACY Widely recognized for its top precision by many sources, Polar H10 is the most accurate heart rate sensor in Polar ’s history; Polar H10 provides top quality ECG measurement and it’s the choice of many pro athletes.
CONNECTIVITY Bluetooth, ANT+ and 5 kHz provide an excellent variety of connection options (e.g. with Peloton); You can use Bluetooth and ANT+ connections simultaneously as well as two Bluetooth connections simultaneously.
POLAR PRO CHEST STRAP With improved electrodes, an easy-to-use buckle and silicone dots, the strap is comfortable and interference-free, and stays put when you’re on the move.

[High Performance of Real-time Heart Rate Tracking] H603 directly extract heart rate data with the self-research algorithm, eliminate noise interference caused by movement and sweating, output the most accurate heart rate data.
[SPLIT CHEST STRAP DESIGN] Different from the traditional chest strap design, H603 adopts split chest strap design to bring you a better product experience.
[LONG BATTERY LIFE] Lasts for 1000 hours: 1 hour per day, 4 times per week,2.5 years working time. (The battery life data are based on laboratory test. The actual situation may be slightly different due to the use environment and other factors.)