High performance and reliability. Please do not turn on the car headlights and appliances when replacing the battery. Extended Cable Clip Car Computer ECU Memory Saver OBD2 Battery Replace Tool By using it, the clock will not change, the speaker and anti-theft device will not be blocked, the glasses and throttle valve will not be adjusted, and the alarm light will continue without error code. How to use: 1.Prepare the battery. 2.Connect to the power supply with the power indicator turning red. 3.Connect to the car OBD socket. 4.You will hear the sound of the machine which indicates that the car connection is excellent and the battery replacement can be started. 5.After replacing the battery, please detach the clamp and you will hear the voice, which means you can replace it successfully. Note: Please do not turn on the car headlights and appliances when replacing the battery. Color: Black Material: Plastic + Metal Package Contents: 1 * Memory Saver Cable with 1 * Cigarette Lighter