Feature:1. PRODUCT FEATURES: This ducted fan with motor achieves perfect dynamic balance and good coordination between the air ducts, providing a good user experience.2. AERODYNAMIC TESTING: This fan and motor have passed good aerodynamic tests, are more stable, have excellent power and are worthy of your choice.3. POWERFUL MOTIVATION: This brushless motor provides powerful power and high efficiency for RC planes, thus providing high speed that you can use with confidence.4. QUALITY MATERIALS: This ducted fan with motor is made of materials, has a service life, works efficiently and is suitable for RC aircraft.5. HIGH RIGIDITY: This ducted fan with motor is fully injection moulded and machined composite for high rigidity and toughness, greatly reducing the rate of damage and making it an excellent RC aircraft accessory.Specification:Item Type: Ducted Fan with MotorMotor Model: QF2611-50mmMaterial: Aluminum Alloy + Plastic + CopperProduct Color: BlackMotor Diameter: 25.8mm / 1.0inProduct Weight: Approx. 113g /4.0ozKV: 4600KVNumber of Blades: 12pcsArchitecture: 9N6PLithium Battery Index: 3-4S LipoMaximum Continuous Power: 550WMaximum Continuous Current: 45APackage List:1 x Ducted Fan with Motor1 x ManualNote:1. Please allow 1?3millimeter error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the object. Please take the one as standard.3. The measurement data are all measured in the actual use environment of the (a fully?charged lithium battery), and may differ from other power measurement standard data.4. The balance test has been carried out before shipment!5. Minors are not allowed to use this product, or must be used under adult supervision.6. Using