12V 2.4G Remote Control Bluetooth receiver. For first use or after replacing the battery, frequency matching is required. This product is designed for specific children's riding toys. Please ensure the purchased part matches the appearance of your original unit. 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 to confirm proper battery installation. Step 2: Press and hold the frequency key (car select) for approximately 2 seconds until the indicator begins flashing. Step 3: Turn on the power supply of the car. The indicator light 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 / B: White Receiver / C: Blue Receiver / D: White Control Color: White & Blue Material: Plastic Package Contents: 1 x Children's Electric Car Remote Control / 1 x Children's Electric Car Receiver Only the items listed above are included; other products are not included. Note: Lighting effects and monitor settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.