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 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: Blue Receiver Color: White & Blue Material: Plastic Package Contents: 1 x Children's Electric Car Receiver Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the photo and the actual product. Measurement may vary by +/- 1-3 cm.