The first use (or battery replacement) requires frequency matching. This product is designed for specific children's riding toys. Please ensure the purchased part matches the appearance of your original component. Step 1: Install two AAA 1.5V batteries (not included), observing correct polarity as marked inside the battery compartment. Close the battery cover. The indicator will flash three times, confirming proper 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 car’s power supply; the indicator will turn off. Step 4: If frequency matching fails (indicator remains on), 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. Due to lighting effects and monitor settings, the color in the image may slightly differ from the actual item. Measurement error is permitted within +/- 1-3 cm.