Dimension: 25mm x 25mm x 7mm(0.98"L x 0.98"W x 0.28"H) Name: DC 5V 2507 BRUSHLESS FAN Cooling Method: Air Fan Blade: 9 Blades Rated Voltage: 5V DC Rated Current: 0.15A Rated Power: 0.75W DC Line Length : 285mm Power Connector Type: 2-Pin XH2.54 Rated Speed: 10000RPM Air Flow: 2.2CFM Noise Level: 26DB Life Expectancy: 28000H at 40 degree test Operation Temperature: From 1degree to 60 degree Cooling Method: Air This is a brand new fan with features such as low noise, high speed, long lifespan, and easy installation. Widely used in computers( pc ), air purifiers, Case, frequency converters, amplifiers, projectors, welding machines, power adapters and other equipment.