Bearing: Sleeve Bearings, Cheap, Use time no more than 12 hours / day, life: 30,000 Hours. Rated Voltage: DC 5V, Current: 0.25A, Power: 1.25W Speed: 2500PRM, Air Pressure: 3.27mmHO, Airflow: 30.95CFM, Noise: 30.10dBA Connector & Line length: USB 39.37in(1000mm), Size: 80mm x 80mm x 25mm Made by WINSINN. Warranty: 1-years for Sleeve Bearings Fan.