Product link: http://amzn.to/20B5oaZ
The unit is pretty simple to install. Take the 4 labeled sensor and install it on each of your tires. Start with the nuts and then the sensor, and tighten everything with the included tools. After plugging in the main unit and turn on your car, it will find the sensor and pair to each other. This process was quick and 3 of my tires were online within 30 seconds, while the finally one didn't register until 2-3 minutes later. Be patience.
The unit let you set Upper Lowe
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