Specially designed Dual (2) set of 50mm Fans powered by a single USB plug. These are made for Coolerguys.com to be used in cabinets or on top of any component that needs an extra boost of air to keep circulation flowing.Many Components and gaming boxes have extra USB ports for easy access to power your 5Volt Fans.PRODUCT SPECIFICATIONS:Dimensions: 50x50x20mmRated Voltage: 5 VoltsConnector: USBTail: 24 inches /From each fan to the USB plugFan Speed: 3000 +/- 10% RPMAir Flow: 8.6 CFMNoise Level:19 DBABearing: Dual Ball BearingMTFB: 50,000 hrsACCESSORIES:(2) 50x50x20mm USB Power FansRoHS Compliance