Feature:1. Fully injectionmolded compound, high rigidity and hardness, greatly reduces damage rate.2. Perfect dynamic balance of the blades and good coordination between the fan ducts.3. More stable, has been tested for good aerodynamics, and has excellent power.4. With brushless motor, this 50mm/2.0in ducted fan fit for most RC plane on the market.5. Motor offers the airplane strong power and high efficiency, provides airplane with highspeed running.Specification:Item Type: RC Ducted FanMaterial: Aluminum Alloy+Plastic+CopperColor: BlackModel: QF2611 50mmNumber of Paddle: 12PcsStructure: 9N6PMotor Diameter: Approx. 25.8mm/1.0inMotor Weight: Approx. 76.5g/2.7ozLithium Battery Index: 3-4S LipoMaximum Continuous Power: 550wMaximum Continuous Current: 45A1. The measurement data is all measured in the actual use environment of the laboratory (a fully-charged lithium battery), and may be different from other power measurement standard data.2. The balance test has been carried out before shipment.Package List:1 x RC Ducted Fan1 x ManualNote:1. Minors are not allowed to use this, or must be used under adult supervision2. Understand and abide by the terms of safe operation3. For safety reasons, do not face the air inlet or outlet of yourself or others4. When using or testing this product, please resolutely place it firmly in the model or other support equipment, and it is forbidden to carry out the poweron test by hand5. When using or testing this product, please do not touch or approach the rotating parts and keep it away from the working fan to avoid serious injury.6. When using or testing this product, please do not allow foreign objects to enter the fan, so as not to damage the product or cause injury to the jury7. This product is only used for modern aircraft or industrial purposes, please do not use it in household appliances or other daily activities.8. This product has passed the "dynamic balance test" when installing the motor, please do not disassemble, repair, or modify by yourself to avoid slowing down the speed.9. Manual measurement, please allow 13mm/0.040.12in error, thank you.10. Due to the difference between different monitors, the picture may not reflect the actual color of the item.