Chest strap – CooSpo chest strap belt works with heart rate monitor and sensor of Wahoo, Garmin & CooSpo.
Soft & comfort – made of Eco-friendly fabric, provides the comfort and security needed when exercising
Adjustable – designed with adjustable length from 25″ ~ 36″, buckle distance 1.77″, please check size you needed before purchase

The hardware and algorithm of the Magene H64 chest strap heart rate monitor have been optimized to improve the reliability and accuracy of heart rate detection during exercise.
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.)
[Compatible Ant+ & Bluetooth] 2 data copies for 1 workout, recording via ANT+ device and Bluetooth App at the same time, with stable transmission. ANT+: Magene, Wahoo, IGPSPORT, Bryton, Black Bird Bluetooth: Zwift, Onelap, Strava, Kinomap, Wahoo Fitness, TrainerRoad, Rouvy, Fulgaz, Nike Run Clus, Openrider, Elite HRV, Selfloops HRV，etc..

[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.)