The provided 320KV/420KV/580KV brushless motor is designed for multirotor drone. Heavy lift drone motor comes with 4S/6S rated voltage to spin 15/16/17 inch propeller and generate the thrust that your drone can fly. The drone motor rpm is optional, suitable for various working environments.
Tips: What is KV in Brushless Drone Motors?
"KV" (not to be confused with “kV” the abbreviation for kilovolt) talks about the constant speed of the motor. The KV rating indicates the RPM a particular motor can produce when a given voltage is applied. Typically, the applied voltage is 1 volt of current. This voltage is usually used without any load connected to the motor.