USB power supply: This computer cooling fan is powered by the USB interfaces of your electronic device or adapter, car, mobile power, and other standard USB ports Adjustable speed mode: This PC cooling fan is designed with adjustable speed mode, which is regulated by the controller to provide concentrated airflows and effective heat dissipation Ideal for enthusiasts, blacksmiths, and electronics technicians requiring thermal management in workshops, kitchens, or equipment rack : This computer case comes with a fan and a 1.5meter-long USB cable, making it and connection to your electronic devices USB5V2A power supply with switches, perfect for placing electronic devices and components in cabinets or rack with limited height, Manufacturer: Msioytog