2.4G remote control toy car accessories. For initial use or after replacing the battery, frequency matching is required. Suitable for children's electric ride-on toy cars. Press and hold the forward and reverse buttons simultaneously; the light will flash. Once the car powers on and the light stops flashing, the connection is successful. When the car power is turned on, the remote indicator light will turn off, indicating a successful connection with the car. Release the buttons to begin using the remote control. Specification: Material: Plastic Remote Controller Size: 15x8.5x2.5cm / 5.91x3.35x0.98inch 1816 Receiver Size: 7.5x3x8cm / 2.95x1.18x3.15inch Update Remote Size: 14x8x2.5cm / 5.51x3.15x0.98inch JR1816 Receiver Size: 7.6x8x3cm / 2.99x3.15x1.18inch Red Chip Receiver 12V Size: 9x8x3cm / 3.54x3.15x1.18inch Package Includes: Optional Remote Controller or 12V Receiver Note: This product is designed for specific children's ride-on toys. Please confirm that the purchased parts match the appearance and model of your existing components. Requires two AAA batteries (not included).