Used Under Armour UA HealthBox, Monitor Heart Rate, Distance, Calorie and Steps Multi-Colored its a nice starter

its a nice starter

and an incredible sweet spot

4" (H x W x D)

CE certified - Spring-loaded side pads utilizing Curv composite and PORON XRD foam provide greater customization for improved fit Occipital lock Titanium construction for lightweight play

and CE certified Tool-free adjustment Single density shell Three distinct shell sizes Floating pro ear loops Ventilation ports

Used Under Armour UA HealthBox, Monitor Heart Rate, Distance, Calorie and Steps Multi-Colored its a nice starterBARELY Used Track your resting heart rate, steps, distance, and calorie burn. 24 7 Automatically track quality and duration of sleep Start and track workouts that capture duration, distance, pace, and calories burned, when worn with UA Heart Rate Features a display that can stay on during workouts with no need for pushing buttons Water resistant