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 about 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: B White Receiver Color: White & Blue Material: Plastic Package Contents: 1 x Children's Electric Car Receiver Note: Other items shown in images are not included. Due to lighting effects and monitor settings, actual item color may vary slightly from the image. Measurement error allowance is +/- 1-3 cm.