Thank you for choosing our bluetooth TPMS 2 external sensors product. This motorcycle Tire Pressure Monitoring System is monitor by APP, provide real-time monitoring of tire pressure and temperature with 5 alarm mode to keep you safe. This motorcycle wireless TPMS system is easy to install. Just set the range of tire pressures and maximum temperature and you are set to go. Or just use the default settings for your parameters. Keeping your tire pressure in the correct range not only can saves lives will saves fuel, and extend tire life. In case of a sudden drop in tire pressure, even still above the minimum setting, you will be alerted to take the necessary precautions. You can set up in 3 easy steps in just 10 minutes. 1. Remove tire valve caps, put in anti-theft screws; 2. Install outer sensor on tire valve in order; 3. Hold the sensor, tighten anti-theft screw.(Each sensor has a unique ID code. Note: Please make sure sensor installed on corresponding tire valve). For Android system: When do the bluetooth scan, the APP will ask for permission of location, please allow to use it, it is android system request when we develop the bluetooth TPMS. Kindly let us know if you need any help, we really would like to give fully support to each customers. Thank you!