Streamline transparent shape with 1 blue led lights. Withstands high temperature. Effectively protect your equipment from overheating and enhance it's stability. Four mats can protect your equipment very well, no need to worry about the abrasion of your equipment. Plug & play. Very convenient. Powered by usb port. Please note: Due to the different number of factory arrival, The shape and color of the USB port of some products may be different, but it does not affect the use, please rest assured to buy. This is a generic product.