Train.Red FYER Muscle Oxygen Sensor + app
Unlock next-level performance with the Train.Red FYER, the most advanced wearable muscle oxygen sensor on the market. While athletes invest in equipment, training plans, and supplements, the true driver of performance is often overlooked: your muscles.
With real-time muscle oxygen (SmO₂%) tracking, FYER helps you optimize training, recovery, and performance like never before. Plus, you can connect 10+ FYER sensors to a single smart device—perfect for team monitoring and group training.
What’s in the box?
✔️ Train.Red FYER sensor
✔️ Charging cable
✔️ Patch Pack (20 adhesive patches)
✔️ Strap Pack (S-M-L sizes)
✔️ Waterproof USB plug
✔️ Durable travel pouch
All you need to know about the FYER
Train.Red tracks your muscle oxygen in real time with sensors. Our smart app translates this muscle data into key features to guide athletes to improve their performance.
FYER USER MANUALSpecifications
- Size: 1.2 x 4.4x 5.9 (cm) / .5 x 1.7 x 2.3 (in)
- Weight: 20 grams
- Measure-depth: up to 20mm in your muscle
- Light source & detector distance: up to 35mm
- Sweat-proof: Yes
- Battery: up to 24 hours during active use
- Speed: 10Hz
- Connectivity: BLE and ANT+
- Materials: high-quality biocompatible ABS and TPE
Train.Red app
Works best with our Train.Red app. You can find the app manual here.
Compatibility
Compatible with: V02Master Manager, Splendo Health & Fit, ANT+ profile like Garmin, Wahoo, etc. As well as Garmin data field
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