High Quality Material and Four Layers of Safety: The versatile heating pad made of high quality PVC material and rubber back, stitched edge.Have protective film, waterproof leather, heating sheet, a non-slip insulating floor safety layer. The switch has a built-in overcurrent protection device to prevent electric shock. Hot desk pad size: 31.5 x 13 inches. 3 temperature levels & Fast Heating: The double-layer heating sheet provides fast heating, and the obvious heat can be felt in 10 seconds, and the heating is even and stable. The heating pad has 3 level temperature, you can choose the right one temperature, enter sleep mode and maintain a constant temperature for 4 hours, which can automatically shut down, save energy and prevent excessive accidents in use or unattended. Great gift for your family or friends: The versatile heating pad can be used for sleeping on the table, walking on the soles of the feet to warm the feet, turning the knees, sitting on the stools… keep warm at all