We ordered this before taking a 3 week trip to the Grand Canyon from Northeast Florida. We have a 1991 Toyota Winnebago. This is Class C and has a large overhang over the cab. We started by connecting the device to our 12V. It turns out we don't need it. There is a lot of sunlight on our dashboard, under a large alcove. Well! The photos I posted were taken before we realized there was enough sunlight under our large canopy. We were able to connect all of these to all 6 hoops simply by following the instructions provided. Yes the manual is very small but if you email the seller directly they will be happy to send you a much larger PDF version. Having this little device was a game changer for us! We had one of those sticky silicone phone pads that you stick on the dashboard. This little block suits him perfectly. As teenagers in the Grand Canyon, we experienced intermittent hardships. This naturally leads to a reduction in tire pressure. Physics 101. The low pressure alarm went on the block, it worked without complaint! Of course, after we were on the road for 5 minutes, the tire pressure rose to normal pressure and no alarm. We love this shop! We saved time and never had to wonder what all our 6 tires were doing. Just take a look and view all tire pressures at any time. I am 57 years old and could easily see tire pressure readings from at least 3 feet away. So we came back from our amazing trip to the Grand Canyon and immediately lost sensor #1 on our tire. I contacted the seller and he sent us another one for free! GREAT! It took a while to arrive from China but great customer service! Overall we are very happy with our purchase and recommend this tire pressure sensor!