Stable performance and high reliability. To determine if the control box is compatible with your vehicle, open the damaged electric car and inspect the control box. If it matches in appearance, the part should be suitable for your vehicle. Instructions for using the remote control are clearly printed on the device. Frequency matching is required when first using the product or after replacing the batteries. Step 1: Install 2 x AAA 1.5V batteries (observe correct polarity in the battery compartment), then close the battery cover. The indicator light will flash three times, indicating proper battery installation. Step 2: Press and hold the frequency key (select car) for approximately 2 seconds until the indicator light flashes. Step 3: Turn on the power of the car unit; the indicator light will turn off. Step 4: If frequency matching fails (the indicator light does not turn off), turn off the power and repeat steps 2 and 3. Power Supply: 2 x AAA battery (batteries not included) Part Name: Children's Electric Car Controller Model: CSR-12T-1B Voltage: 12V Size: Standard Color: As Shown Material: Plastic Package Contents: 1 x Receiver 1 x Remote Control Note: The package includes only the items listed above. Other products are not included. Note: Lighting effects and differences in display screens may cause slight variations between the color of the item in the photo and the actual product. Measurement error allowance is +/- 1-3 cm.