Speed ControllableEasy Cloud 120 mm case fan allows you to freely adjust the fan speed according to your needs. This flexibility allows you to adjust fan operation to a level that best suits your environment, whether you require powerful cooling or a quiet work environment AC PlugDual-ball bearings have a lifespan of 50,000 hours. Easy Cloud 120mm computer fan comes with 3V to 12V multi-speed controller, increases maximum fan speed and powers the fan from an AC outlet. Just plug it into an outlet and start the computer cooling fan ApplicabilityDesigned to meet the cooling and ventilation needs of a variety of devices, including pcs, game consoles, appliances, entertainment equipment, solar equipment and more, this computer cooling fan provides effective silent cooling and is also an ideal replacement for your existing fan. No matter what type of equipment you have, this case fan ensures it stays at the right operating temperature,