USB Power Heating Mouse Pad-Keep Warm in Winter Mouse Pad-113 Degrees Fahrenheit Constant Temperature Warmer Mouse Pad Protect Your Hands From Frostbite Comfortable Heated Mouse Mat Warmer usb mouse pad dimension:10*8.6 inches(25*22cm),The interior is approximately a circle with an perimeter of 8.3 inches and the height is 3.5 inches. it has enough space to use a mouse.,Supported by computer USB power or 5V phone charger or portable power bank,it also with a wrist rest. Constant temperature:Keep the temperature at 113 degrees Fahrenheit(45 degrees Celsius),never afraid to use computer in cold winter,Comfortable. Mouse pad cable length:47 inches(120cm),The cable is power only,can not use for data transfer,the mouse needs to connect to an other computer USB port. Why the heating pad mounted on the top of the warmer mouse pad and in contact with the back of the hand?If the heating pad is installed at the bottom of the mouse pad, we put the hand on the mouse when we use it,Only the bottom of the mouse touches the heating part, which will cause the mouse to be damaged and the hand will not feel warm. If does not work(Even if the warranty period is exceeded),do not worry,please contact us immediately,we can re-send a USB heating pad to you.