Specifications: Rated Voltage: 12V Speed: 40000RPM Material: Metal Net Weight: 450g Application: Motor is used in the majority of kids, can replace the 550 motor directly package contains 2Pcs motor, 2Pcs S gear and 2Pcs B gear, 2Pcs C gear This is a high-speed motor. Note: The power is relatively large and the current is very high. Before you change, please ensure that your car can withstand, otherwise it is easy to burn.