12V 2.4G Remote Control Bluetooth Receiver. For initial 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 current unit. Step 1: Install two AAA 1.5V batteries (not included), observing correct polarity as marked inside the battery compartment, then 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 begins to flash. Step 3: Turn on the power supply of the vehicle; 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: C Color: White & Blue Material: Plastic Package Contents: 1 x Children's Electric Car Receiver Note: Other items not included. Due to lighting effects and monitor settings, the color in the image may slightly differ from the actual item. Measurement tolerance: +/- 1-3 cm.