Features: Offer functions activation, reset and matching on the vehicles which comes with the tire pressure Sensors up to December, 2017 year. Ensure the vehicle is the TPMS Learn mode,and follow the service procedure.Hold tool against the sidewall of the tire,near the valves stem. Depress the button on the top of the device while holdings the tool against the tire sidewall. When the car horn sounds, press the button belows the device. The green LED indicates that the tool is transmitting. Specifications: Material:ABS Functions:Activation,Reset,Matching Package Includes: 1x TPMS Relearn Tool note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.