Stable percompatible withmance and high reliability.How to tell if the control box is suitable compatible with your car? Open the damaged electric passenger car and check the control box. If the control box looks the same, the part should fit your car.The instructions compatible with using the remote control are clearly printed on the box.Frequency matching is required when using it compatible with the first time (or replacing the battery)Step 1. Install 2 x AAA 1.5V batteries, (pay attention to the positive and negative polarity in the battery compartment), and finally close the battery cover, the indicator light will flash three times, indicating that the battery is installed correctly.Step 2. Long press the frequency key (select car) compatible with about 2 seconds, and the indicator light flashesStep 3. Turn on the power of the car machine, and the indicator light goes outStep 4. If the frequency matching is unsuccessful (the indicator light does not go out), turn off the power and repeat steps 2 and 3.Power Supply:2xAAA battery(Not included batteries)Part name:Children's electric car controllerModel:CSR-12T-1BVoltage:12VSize:StandardColour:As ShownMaterial:plasticPackage Contents:1 x Receiver1 x Remote ControlOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.