The USB thermal mouse pad has a built-in thermal pad to help you warm your cold hands while working. $ After the mouse pad is connected to the computer, the temperature will rise to a suitable level, just insert it into the USB port, you can warm your hands at any time. $ Size: 23x23cm (9x9 inches); large internal space, you can move and use the mouse flexibly. Package includes: 1 X USB heated mouse pad$ Please note that the heater is separate from the mouse pad. When using a warm mouse pad, you can choose to use or not use a heater. $ Lovely design, beautiful and practical, suitable for home and desk.