Safety first: USB powered heating pad ensures the safety, stability and continuous heating of your hands. There is no high-risk high voltage. The number one life challenge in cold winter - The computer mouse hand warmer has three temperature settings and three time limit options. When your hands are too cold to go to school, work or work in the garage, you can choose it. If your hand is cold, you need to make it well. This heated mouse pad may be your dream computer accessory. Time and temperature: Choose the temperature that best suits you between 110, 130 and 140 degrees Fahrenheit. Now your mouse hand will never be too hot or too cold. Two, four, and eight hour timer settings ensure that the USB heated mouse pad does not turn on for too long. Material: Arctic velvet+silicone pad