COROS / heart-rate-monitor
Heart Rate Monitor
Upper-arm optical heart-rate sensor for athletes who prefer an arm band over a chest strap during mixed running and functional training.
Direct answer
The COROS Heart Rate Monitor is an optical upper-arm sensor with up to 38 hours of operation and three Bluetooth connections. For HYROX it is most relevant when arm placement is more comfortable than a chest strap and your watch or phone accepts an external Bluetooth heart-rate sensor.
Verified specifications
- Designed to be worn on the upper arm
- Multi-channel optical sensor
- Up to 38 hours of continuous operation and 80 days standby
- Up to three simultaneous Bluetooth connections
- Standard arm size 18–32 cm; large 24–43 cm
Trade-off
The arm placement can feel less intrusive than a chest strap, but COROS uses Bluetooth rather than ANT+ for this sensor and compatibility still depends on the receiving device.
Source & freshness
COROS official Heart Rate Monitor specification · 2026-09-29
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Where to buy
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Offers for US.
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