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and performance like never before
the most advanced wearable muscle oxygen sensor on the market
What’s in the box
FYER helps you optimize training
Train.Red FYER 2.0 Muscle Oxygen Sensor + app NIRS and performance like never beforeUnlock next level performance with the NEW Train. Red FYER 2. 0, 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 (SmO%) tracking, FYER helps you optimize training, recovery, and performance like never before. Plus, you can connect 10+ FYER sensors to a single smart
