Stable performance and high reliability. How to tell if the control box is suitable for your car Open the damaged electric passenger car and check the control box. If the control box looks the same, the part should fit your car. The instructions for using the remote control are clearly printed on the box. Frequency matching is required when using it for the first time (or replacing the battery) Step 1. Install 2 x AAA 1.5V batteries, (pay attention to the positive and negative polarity in the battery compartment), and finally close the battery cover, the indicator light will flash three times, indicating that the battery is installed correctly. Step 2. Long press the frequency key (select car) for about 2 seconds, and the indicator light flashes Step 3. Turn on the power of the car machine, and the indicator light goes out Step 4. If the frequency matching is unsuccessful (the indicator light does not go out), turn off the power and repeat steps 2 and 3. Power Supply:2xAAA battery(Not included batteries) Part name:Children's electric car controller Model:CSR-12T-1B Voltage:12V Size:Standard Colour:As Shown Material:plastic Package Contents: 1 x Receiver 1 x Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.