Water Cooling: This brushless motor for RC boats uses a dual heat dissipation system with air cooling fans on the back and water cooling for optimal performance. Balanced Rotor: The precisely balanced rotor ensures high reliability and maximum smoothness in RPM. Precise Design: Engineered for maximum energy conversion efficiency. High Efficiency: Provides high efficiency operation with low noise and low energy consumption. Premium Materials: Constructed from high-quality aluminum alloy and copper for durability and robustness. Specifications: Item Type: Brushless Motor for RC Boat Material: Aluminum Alloy and Copper Color: Blue KV Value: 1500KV Applicable Voltage: 2-6S (7-22V) Maximum Current: 30A Maximum Power: 600W Motor Diameter: Approx. 28 mm / 1.1 inches (excluding wires and nozzles) Motor Height: Approx. 62 mm / 2.44 inches (without shaft) Shaft Diameter: Approx. 3.17 mm / 0.12 inches Cooling Method: Air-cooled and water-cooled (fan on the back and water cooling system) Water Nozzle: Approx. 4 mm / 0.16 inches (suitable for 3 x 5 silicone tubing) Connector: Approx. 3.5 mm / 0.14 inches banana plug male Application: Remote control RC boat Package Includes: 1 x Brushless Motor for RC Boat Customer Satisfaction is our top priority. If you encounter any issues after receiving your product (damage, incorrect quantity, etc.), please contact us immediately for a solution.