Convenient USB Fan: The USB plug can be powered by a USB adapter or popular audio-visual electronic equipment and the USB port on the back of the game console to power the fan. Three-speed: The computer fan has a multi-speed controller that can set the fan speed to the best noise and airflow level. 3 gears, low (L), mid (M) and high (H), low-gear noise is only 23dB. DIY: 2 fans can be connected together with a metal buckle to provide greater air volume. The whole size of the fan is 9.64" X 4.92" X 1.81" after puting together. It can be used as a cooling fan for a notebook computer. The fan can be flat or upright with the shockproof foot pad. High QualiComprehensive Protection: The iron grills on both sides of the fan can protect your hands and prevent damage to the power cord during operation.ty: The double ball bearing features 65,000 hours long life with normal use, 7 blades generate strong airflow to keep the cabinet cool. Comprehensive Protection: The iron grills on both sides of the fan can protect your hands and prevent damage to the power cord during operation.