Bought for a car with low profile tires. As others have said, the included instructions are useless. Also, the monitors for the front tires were swapped. After a long search on the internet I found a site with a similar product so I could reprogram the sensors. I don't care how clunky they look on my branch, but it pays to have the peace of mind of being able to spot a bad tire. Recommend it to anyone who doesn't have TPMS. Update: Two monitors show 3 pounds less than tire. I've tried resetting etc, it still doesn't light up. Less than a year old, can't find a solution to the problem.