Heated Foot Warmer, Electric Foot Heating Pad for Pain Relief, Silver Gray, 6 Levels, Fast Heating for Abdomen (US Plug 100-120V) Brand new, unused. Size: US Plug 100-120V Temperature Controller: Displays the level. The higher the value, the higher the temperature, and you can adjust the 1-6 level temperature switch. Chip Control: Built-in chip, and if the product temperature is too high, it will automatically start the power-off function. Constant Temperature: Intelligent temperature control, automatic power adjustment to keep the temperature constant within a safe range. 6 Gear Adjustable: With the included controller, you can control the effects of neck, shoulder, and back treatments. Soft Fabric: Made of flannel material, it is soft and comfortable, smooth and delicate. Built-in warm pad, effectively locks in the temperature. Foot Warmer Electric Foot Warmer Heated Foot Warmer Electric Foot Heating Pad 14-23/4192.