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. Turn on the car power—the light stops flashing, indicating a successful connection. Once the remote indicator light turns off after powering on the car, the connection is established. 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 verify that the purchased item matches the appearance and model of your existing parts. Requires two AAA batteries (not included).