The product comes with a slow start function, no additional slow needs to be installed. and hold the forward and reverse buttons at the same time, the indicator light flashes, then start the vehicle, the indicator light stops flashing, and the connection is successful. How to tell if the control box is suitable for your vehicle? Open the damaged electric vehicle and check the control box. If the control box looks the same, the part should fit your vehicle. JR1738RX-12V Children's Electric Vehicle Receiver 2.4G Remote Control. Part Name: Children's Electric Vehicle Receiver Remote Control Model: JR1738RX-12V Size: Standard Voltage: 12V Control: 2.4G Use: Vehicles and remote control toys Remote control peripherals/equipment: Remote control Four-wheel drive attribute: Assembled Material: plastic Color: As Shown Package Contents: 1 x receiver 1 x remote contro Only 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.