Motor parameters: Built-in motor model 3550, KV500, power 600W, voltage 12-24V. Material: Nylon shell + aluminum cover motor; weight of a single propeller is 290g. PC resin propeller, durable, corrosion-resistant, tough, long-term use will not break the propeller. Application scenarios: Underwater thrusters are widely used in various fields, such as ship models, underwater robots, remote control ship models, and fishing boats. Freshwater thruster: Powerful propeller design and unique underwater operation for your toy. Note: The product is a brushless propeller, which must be driven by an ESC and cannot be directly connected to the battery. Battery specification is recommended to use 12V, 20A current or 24V, 30A current. Do not operate without water for extended periods. Do not touch the blades with hands. Size Chart: Thruster length: 130mm / 5.12 inches Package Includes: 1 x Underwater Thruster Note: 1. Please allow slight variation due to manual measurement. 2. Due to differences between monitors, the image may not reflect the actual color of the item. 3. Have a great shopping experience!