Stable performance and high reliability. To determine if the control box is compatible with your vehicle, open the electric passenger car and inspect the control box. If the control box appears identical, the part should be suitable for your car. Instructions for operating the remote control are clearly printed on the device. Frequency synchronization is required upon initial use or after battery replacement. Step 1: Install 2 x AAA 1.5V batteries (observe correct polarity in the battery compartment), then close the battery cover. The indicator light will flash three times, indicating correct battery installation. Step 2: Press and hold the frequency key (select car) for approximately 2 seconds until the indicator light flashes. Step 3: Turn on the power of the car unit; the indicator light will turn off. Step 4: If frequency synchronization fails (the indicator light does not turn off), turn off the power and repeat steps 2 and 3. Power Supply: 2 x AAA battery (batteries not included). Part Name: Children's Electric Car Controller. Model: CSR-12T-1B. Voltage: 12V. Size: Standard. Color: As shown. Material: Plastic. Package Contents: 1 x Receiver, 1 x Remote Control. The package includes only the items listed above; other products are not included. Note: Lighting effects and monitor differences may cause slight variations between the color of the item in the photo and the actual product. Measurement may vary by +/- 1-3 cm.