High quality. Well made looks like OEM for 2006 Jeep Grand Cherokee 315MHz. They sync after 30 minutes of driving. But. One of the four sensors I purchased has failed and is reading either too high or too low, resulting in a TPMS warning on the dash. I paid to have them installed and it will be a hassle to change them. Been to the tire shop several times. not free either. That means exchange to Amazon and back to the tire shop.