Domorra

Domorra H303 Heart Rate Monitor – Dual ANT+ & Bluetooth Chest Strap Sensor for Cycling, Running, Fitness & More

$64.95 USD

~~$89.95 USD~~ $64.95 USD

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Color H64 HR Sensor H303 HR Monitor

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Accurate, Real-Time Heart Rate Tracking

The Domorra H303 Heart Rate Monitor is built for athletes and fitness enthusiasts who demand precision. Featuring a newly engineered chipset and motion-interference-resistant algorithm, it delivers ultra-accurate heart rate readings even during intense workouts. Sweat and movement won’t disrupt your training data—maximize every session with confidence.

Smart LED Indicator for Real-Time Feedback

Stay focused on your workout with the built-in LED light, which flashes to confirm proper connection and heart rate detection. The sensor automatically activates once worn, flashing a red light to indicate it’s ready to go. Visual cues keep you informed without breaking your rhythm.

Dual Connectivity: ANT+ and Bluetooth Support

The Domorra H303 supports simultaneous dual transmission—connect to an ANT+ cycling computer and a Bluetooth fitness app at the same time.
ANT+ Compatibility: Wahoo, Bryton, Magene, IGPSPORT, Black Bird
Bluetooth Compatibility: Zwift, Strava, Onelap, TrainerRoad, Rouvy, Fulgaz, Nike Run Club, Kinomap, Wahoo Fitness, Elite HRV, and more.
Also integrates seamlessly with connected equipment like Peloton bikes, Onelap trainers, ProForm treadmills, Echelon systems, and NordicTrack/iFIT.

Built for Performance & Durability

Made with high-quality, wear-resistant materials, the Domorra chest strap is comfortable, durable, and designed to withstand high-intensity workouts. It’s IP67 water-resistant—ideal for sweaty sessions and light rain (not for swimming).

Long Battery Life for Extended Use

Powered by a high-efficiency coin cell battery, the H303 offers up to 1,000 hours of use—that’s about 2.5 years with typical weekly usage. Train hard without worrying about battery replacements.

Versatile for All Training Styles

Perfect for cycling, running, strength training, HIIT, soccer, basketball, and more. Whether you're chasing endurance goals or optimizing heart rate zones for fat burn, the Domorra H303 helps you train smarter.