Specification Brand : Aihjcnele BulletPoint1 : ✅ Power supply range: DC 4V to 12V ( USB port). BulletPoint2 : ✅ Output range: DC 3V to 8V (Not fit 12V USB fan). BulletPoint3 : ✅ Rated power: 5W (Do not overload.),When used to adjust the fan in two stages, please put the fan in one gear, otherwise it may not be able to adjust the speed! BulletPoint4 : ✅ For specific product details and parameter information, please refer to the product description at the bottom of the page. For more information on how to use the product, please refer to the product description. BulletPoint5 : ✅ Please Note that , This is a precision product, Please use with care. You need professional knowledge to use this product. If the product is damaged due to an operating error, it cannot be returned. beg to be excused. All products are factory tested. Tools DIY products. Please understand. Thanks . Color : 3-pcs ElectricFanDesign : window_fan ExternallyAssignedProductIdentifier : 7675290135652 IncludedComponents : No ItemName : Aihjcnele DC5V USB Fan Stepless Speed Controller Regulator Wind Speed and Air Volume Regulator with Switch Mini Speed Module DC 4-12V to 2.5-8V 5W Multi Gear Adjustable (3-pcs) ItemPackageDimensions_Height : 0.1 inches ItemPackageDimensions_Length : 0.1 inches ItemPackageDimensions_Width : 0.1 inches ItemTypeKeyword : motor-speed-controllers Manufacturer : arenmi ModelName : AIHJCNELE ModelNumber : 1866370 NumberOfItems : 1 PartNumber : arenmi PowerSourceType : dc ProductDescription : DC5V USB Fan Stepless Speed Controller Regulator AIHJCNELE Wind Speed and Air Volume Regulator with Switch Mini Speed Module DC 4-12V to 2.5-8V 5W Multi Gear Adjustable ProductSiteLaunchDate : 2024-10-15T05:15:43.240Z Size : Mini SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1