Stay Warm Anytime Anywhere: Wherever you need warmth, they can help! Great for keeping the cold at bay during winter. The heating pad is portable, easy to use, and simple to store. NOTE: No Power Bank. Please purchase a power bank separately. This heating pad is designed for use with various chairs or backrests Adjustable Temperature Design: The portable heating pad is made from high-frequency compressed suede fabric and memory foam for enhanced durability. It features three levels of temperature control, allowing you to adjust the heat to meet your realistic needs Double fixation: The heated cushion features elastic straps, easily attach to the back and bottom of the chair during installation.