Shop FitMetrix Heart Rate Monitor FMX4 PreviousONZIE Velvet Crop Top NextEsseutesse Leather Fringe Sneaker - White FitMetrix Heart Rate Monitor FMX4 FitMetrix Heart Rate Monitor FMX4 $55.00 Track your performance in or out of the classroom with the FitMetrix fmX4. Pair with your fitness app to perform at your peak! Quantity: Add To Cart Facebook0 Twitter Tumblr