Motor with Red rear cover, which is a magnetic motor with high torque and high speed, can use 3V-6V power to drive, and the maximum speed can reach 5000 RPM to 10000 Rpm. It is recommended that you use a 3V drive motor, to ensure the service life of the motor.DC motors can help you release your imagination to the fullest for DIY design, which can exercise your hands-on ability and learn knowledge. DIY creation: you can use the electric motor to assemble and build various projects, such as electric toy cars, electric toy airplanes, and more, or as a prop for campus scientific experiments to popularize basic circuit knowledge for students, or give it as a gift to your friends and DIY creation with your friends