This product is a dual ball bearing computer fan. It is made of premium materials. It is safe and durable. It can serve you for a long time without being easily damaged. It is an excellent dual ball bearing computer fan that can bring you convenience, allowing you to have comfortable experience. Features -Color: Black -Material: ABS -Size: 12.00X12.00X2.50cm/4.72X4.72X0.98in - Made of premium ABS materials, this cooling fan is durable and practical for long-lasting use. - Great performance and cool down your computer cases, very cool and practical. - This cooling fan is perfect for computer chassis, computer mining , , and etc. - It is in stable characteristics, high performance and it is in great reliability, simple, easy to install. - workmanship, reasonable structure, professional and practical, can bring you convenience. Specification Power supply: large male and female interface, support multiple fans in series Voltage: DC 12V : 0.5A Speed: : 154.5CFM Noise: about 55dB-A Bearing: High precision bearing Fan rotation direction: counterclockwise when viewed from the direction of the fan Operating temperature: - Celsius to +70 degrees Celsius Storage temperature: -40 degrees Celsius to +70 degrees Celsius Power supply range: plus or minus 15% of rated power supply Insulation resistance: greater than 500 megohms Withstand voltage: sink leakage 0.5mA 500V/1 minute Working life: at ambient temperature of Package list: 1 x computer fan