Features: The main function is to monitor car tire internal pressure and allow you to know the tire condition. Good accuracy and sensitivity, enhance the safety of your vehicle. A aftermarket replacement directly replaces your old or broken one. This is a non-OEM product, accessory only! Specification: Color: Black, Silver Tone Material: Plastic, Metal OE Number: 248887 Frequency: 433MHz Thread Size: M8x0.8 Size: 7.2x5.8x2.3cm / 2.83"x2.28"x0.91"(L*W*H) Fitment: for Volkswagen Touareg 2010-2014 for Porsche Cayman 2009-2012 for Porsche Cayman 2014-2015 for Porsche Cayenne 2011-2014 for Porsche 911 2009-2016 for Porsche Boxster 2012-2016 for Audi S8 2009-2010 for Audi S8 2013-2016 for Audi R8 2009-2012 for Audi R8 2014-2015 for Audi Q7 2007-2014 Note:New and old random Package Included:1 x Tire Pressure Sensor How to Install and Use: Step 1: Remove the tire and the tire pressure sensor/valve; (the whole tire needs to be removed) Step 2: Install the newly purchased product; Step 3: After the product is installed, please stop the vehicle and turn off the engine for about 20 minutes, and keep the remote control key 5 meters away from the vehicle; Step 4: Start the vehicle and keep the vehicle running at a speed of more than 25 km/h for 5 to 10 minutes, then the product should be matched; Step 5: If the temperature is low, such as, below 0°C, the matching time may be longer, which is normal, please wait patiently for the matching. If you still have problems, please .