Promotes blood circulation, soothes lower backaches, and relieves abdominal pain. Versatile design allows it to be worn on the neck or beneath clothing around the waist to stay warm in chilly weather. Crafted from soft and breathable smart heating textile for a comfortable fit on your waist. Adjustable design with snap buttons ensures a comfortable fit on various body parts. Upper slits can double as pockets, allowing you to slip in your hands for warming while keeping the abdominal area cozy. control / smartphone app: five heat-setting levels & maintain constant temperature 15/30/60-minute timer *smartphone app can connect up to 6 KnitWarm products at the same time