Features: and Rated Voltage: 5V DC.Fan Size: 70x70mm; Connection: USB interface.Bearing Type: Double Ball Bearing,high precision,long life and low noise.USB plug can power the fan through USB ports found behind popular AV electronics and game consoles.Widely used in 3D printers, fax machines, banner machines, medical instruments, automotive electronics, computer accessories, electric power, electric vehicle chargers, network cabinets, communication, inverters, transformers, industrial control, Humidifier,Stage lighting, new energy, engines, instrumentation, or anywhere & electronic that need to cooling.Specifications:Voltage: 5V DCConnection: USB interfaceBearing Type: Double Ball BearingFan Size Speed: (optional)70x70x25mm (2500PRM),70x70x15mm(3500PRM),70x70x10mm (2500PRM)Note:Other accessories demo in the picture is not included.Due to manual measurement, please allow size differences about 1-5mm.Due to the light and screen setting difference, the item's color may be slightly different.Package includes:1 x Cooling Fan