train red fyer muscle oxygen sensor blood pressure monitor Worn on the forearm

Worn on the forearm

Sport smart Easily activate workout mode right on your wrist by choosing from over 30 sports

Choose from either professional bike fit measurements

the material they use in real race cars

to achieve that we have combined Premium SCS #39 Yamamoto fabrics known for their high heat retention

train red fyer muscle oxygen sensor blood pressure monitor Worn on the forearmFREE DELIVERY IN EUROPE Delivery in 3 5 days (EU) The FYER is the smallest and most innovative wearable muscle oxygen sensor in the world. To improve your performance, you invest time and energy in equipment, standardized training programs, supplements, etc., but often we forget the one thing that drives our performance: our muscles. Our FYER muscle oxygen sensor comes with: the Train. Red FYER, a charging cable, one Patch Pack (20 patches), and one