The first use (or when replacing the battery) requires frequency matching. This product is designed for specific children's riding toys. Please ensure the purchased part matches the appearance of your current unit. Step 1: Install two AAA 1.5V batteries (not included), observing the correct polarity as marked inside the battery compartment. Close the battery cover. The indicator will flash three times to confirm correct battery installation. Step 2: Press and hold the frequency key (car select) for approximately 2 seconds until the indicator flashes. Step 3: Turn on the power supply of the car. The indicator will turn off. Step 4: If frequency matching fails (indicator does not turn off), turn off the power and repeat steps 2 and 3. Type: A Blue Control Color: White & Blue Material: Plastic Package Contents: 1 x Children's Electric Car Remote Control Note: 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.