Small 120mm 12V computer fan powered by a wall wart. It is really easy to adjust its speed with a knob. Works great for DIY fan or as an extra cooling fan for your gaming needs, such as plant cabinet, RV refrigerator, X-box, PS4, amplifier, kitchen window, server, humidifier, mushroom growing, sound system, etc Variable speed fan is ideal for cooling electronic components. This is especially true when components are used in a cabinet with limited airflow to help cool. Having a variable speed, you can adjust the speed for proper cooling with the lowest fan noise from the circulating air. And you can plug in a wall outlet to use Adjustable Wind We have taken into account your various needs, the fan can rotate the speed from 750rpm to 3000rpm, providing the most suitable wind to quickly cool down your devices. You can get the right airflow with the lowest noise Can be used as a small window fan for exhaust and intake; increased air circulation in crawl space, basement, attic and garage; or as exhaust fans for enclosed cabinets, DIY media shelf project, small smoking corner, gaming cabinet You will get 120mm cooling fan, 1 speed controller, 4 installation screws, 4 rubber feet