【Size】- Hotter usb mouse pad dimension: 2922cm (11.48.6inch). Never be afraid to use the computer in the cold, comfortable winter. (. If it doesn’t work, don’t worry, please contact us immediately, we can resend a heater or mouse pad to you.) 【Easy to use】 - Just plug it into the USB port , then you can warm up your hand while using the mouse inside. Beautiful design, beautiful and practical, suitable for home and office use. 【Easy to clean】 - Simply remove the heating element and you can hand wash your heated mouse pad hand warmer anytime. The higher quality construction means it will last a bit longer than most USB heated mouse pads available today. 【Note】- Why the heating pad is mounted on top of the pad warmer and in contact with the back of the hand? If the heating pad is installed at the bottom of the mouse pad, we put our hands on the mouse when we use it, only the bottom of the mouse touches the heating part, which will damage the mouse, and the hand will not be hot.