This is the cordless wrap that uses air compression, heat, and cold to massage, improve circulation, soothe sore muscles, and reduce swelling in the calves, thighs, and biceps. Fits arms/legs up to 22" in circumference and secures with hook-and-loop fasteners and can be worn anywhere. It provides three levels of compression ranging from 160mmHG to 320mmHG using three inflatable air chambers that adjust easily at the touch of a button. Its built-in heating element combines with a graphene heat exchanger to enhance heat conductivity while providing three heat settings (104°, 122°, or 140° F). The included cold pack slides into a pouch for cold therapy. With a 30-minute timer that shuts off the device automatically. Covers an 8 1/2" area around a calf, thigh, or bicep. Provides up to 1 1/2 hours of use from a 1 1/2-hour charge using the included 3'-long USB adapter.