Stable performance and high reliability. To determine if the control box is suitable for your vehicle, open the damaged electric passenger car and inspect the control box. If the control box appears identical, the part should be compatible. 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. The package includes only the items listed above; other products are not included. Note: Lighting effects and monitor differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.