Material: Other Packaging: 1PC Size: approximately 38.5 * 24MM Motor specification: 18.3 * 24 MM Motor height: 30.5 MM Motor shaft diameter: 2.0 MM Output shaft length: 8 MM Voltage: DC3V, DC3.7V, DC4.2V, DC5V No load current: 0.42 A, 0.43 A, 0.46 A, 0.52 A No load speed: 13500 RPM, 16800 RPM, 19000 RPM, 22000 RPM This 280 motor is a strong magnetic motor with excellent magnetic force. Thick material, micro motor, high-speed and high-power. The motor is made of enameled wire with an outer diameter of 0.37 MM. In addition, the motor is highly magnetic and requires high speed and power, so a large current is required. It is recommended to supply a power source with a current of 3A or more. If the current is too small, the power and torque of the motor cannot be fully utilized. be careful: Perhaps due to a long time, some motors may not be quiet when running. If you have strict requirements for sound, you can also apply a little lubricating oil to the front and rear copper sleeves of the motor, car oil, motorcycle oil can also be used, and other types of lubricating oil can also be used, so that the sound can be quieter immediately.