?2010 Hydraulic Bearings Fan - High Speed version?High quality Hydraulic bearings, Better than Oil bearings, More stable and Long life, suitable for continuous work. The life expectancy is about 45,000 hours.?Size: 20x20x10mm?Rated voltage: DC 5V ?Line length: about 11.8in / 30cm---------------------------------------------------------------------------------------------------------------Package include: ?2 x High Speed 2010 5V Hydraulic Bearings Fan---------------------------------------------------------------------------------------------------------------------Product Warranty: -WINSINN are devoted to offer premium quality products to all cherished customers. Meanwhile supply 60 days money back guarantee and 24 months warranty. -If there are any questions, please feel free to contact us, WINSINN Customer Service Team will spare no efforts to assist with you within 24 hours.