This is a tire pressure reset device, or in other words, a learning device. After each tire rotation, tire, body control module, and tire pressure sensor replacement, the sensor re matching program must be performed to the accuracy of tire pressure value acquisition and display. Fitment: 2007-2015 for , 2007-2015 for , 2008-2015 for MKZ, 2008-2015 for MKS, 2008-2015 for Navigator, 2008-2011 for Town Car, 2007-2008 for Mark Operation steps: 1. that the car is in TPMS learning state/mode. 2. Follow the car maintenance procedure, hold the instrument in sequence (left front, right front, right rear, left rear), align it with the tire sidewall near the valve stem, and the green reset button. 3. At this time, the green LED light (TX light) light up, indicating that the signal is being transmitted. When you hear the car beep sound, it means that the matching is successful. 4. Match the other tires in sequence, and the product flash continuously to complete the matching of 4 tires at once. After successful matching, the red power button to turn off the power Applicable Models: for 2007-2014 for 2008-2015 for F-450 F-550 Super Duty 2007-2015 for 2007-2014 for Edge 2006-2015 for Escape 2008-2015 for Expedition 2006-2016 for Explorer 2008-2015 for Flex 2008-2015 for Taurus 2008-2015 for E-150 E-250 E-350 E-450 Econoline 2008-2015 for Fiesta 2008-2015 for Focus 2008-2015 for Fusion 2008-2011 for Crown Victoria 2011-2015 for Transit Connect 2006-2011 for Colour:Red Material:ABS Package Contents: 1 * EL-50449 II Tire Pressure Reset Activation Tool 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.