Wireless & Portable, Comfier foot and leg massager with heat is powered by rechargeable lithium-ion batteries. No need to plug in while in use. It can provide a relaxing massage for up to 80-90 minutes after one full charge. Convenient to get muscle relaxation anywhere, anytime. Pressure Massage, Comfier foot and leg compression massager can provide soothing massage from calf, ankle to toes to get leg and whole foot relaxation. Multiple Settings, Comfier foot and calf massager with heat and compression has 3 massage modes and 3 levels of intensity for choose from, you can customize a setting to achieve the best massage. Heat Therapy, the leg and foot massager with heat can quickly heat-up to provide soothing warmth to the entire sole to further relax stress. It’s the perfect feet warmers, with 2 heat settings options. Flexible Size Fits All Feet: Comfier cordless feet and leg massager is designed to be flexible and suitable for family use. The leg and calf wraps can be adjusted easily by Velcro to change the size to fit specific user, the maximum calve size can reach 28 inches.