Stable performance and high reliability. How to determine if the control box is compatible with your vehicle: Open the electric car and inspect the control box. If the control box matches the appearance of the unit, the part is likely compatible. Instructions for using the remote control are printed on the packaging. Frequency matching is required upon initial use or after battery replacement. 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, confirming correct battery installation. Step 2: Press and hold the frequency key (select car) for approximately 2 seconds. The indicator light will begin to flash. Step 3: Turn on the power of the vehicle. The indicator light will turn off. Step 4: If frequency matching fails (the indicator light remains on), 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 items are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.