Blue Jay Universal Gel Ankle Support w Hard Exterior Shell Scales Baby Battery Module * Optional Accesorie Hip Kits Battery Module * Optional Accesorie for the following items: CHAT2763 CHAT2786K CHAT2760K CHAT2788K CHAT2793K CHAT2797K CHAT2791K CHAT2795K * You can set the target zone for your training as beats per minute (bpm) as a percentage of your maximum heart rate or as a percentage of your heart rate reserve (HRR%) * Polar Fitness Test: Polar Fitness Test measures your aerobic fitness at rest in just five minutes HCPC Code: L4350 * Color: Black * Interior gel pad provides a comfortable contoured fit while the exterior hard shell minimizes rolling * Upper air and lower gel pads provide a comfortable contoured fit around the ankle * High impact shell minimizes rolling of the ankle without limiting plantar and dorsi flexion * Molded plastic shell is tapered for a comfortable fit in most shoes * Fully adjustable movable straps can be positioned and trimmed for customized fit * Fits left or right ankle