Tymate RV Tire Pressure Monitoring System - M7-3 TPMS Tire Pressure Monitor System(0-87 PSI) with Solar Charger, RV TPMS with 4 sensors & 5 Alarm Modes, LCD Display, Auto Sleep Mode, Easy to Install

Installation was very easy. The device works as expected and is very accurate. The customer service was above expectations. We asked for a replacement after approximately 1 year due to a recharging issue. Email communication with them was clear and fast, and the new device arrived promptly.

One of my best all-time purchases! It works awesome on my trailer tires. I can easily manage so 4 trailer tires. It gives me a warning prior to their being a problem allowing me to find a safe spot to pull off before a major problem. Works exactly as described after two years of using. The display is a little small but I can deal with it. I love the solar charging

I bought this to use on my single axle small trailer. Reading about trailer tires, I have learned that proper pressure is even more critical than with car tires. They are also more prone to rapid pressure loss / blowouts. A TPMS can at least provide some margin of safety against those problems. Internal systems are expensive to buy and then must be mounted inside the tires, another expense. The external system addresses both issues. Within the constraints of an external system, this product works well. I give it 4 stars, knocking one star off for being a little inaccurate and some other quirks. Overall, it's a good system and at this price, I will keep it.ProsVery easy to install and use. You take off the dust cap and mount a sensor in its place with a dust cover and locking nut behind it.The monitor is a nice size, large enough to read but small enough to just sit on the side of my dashboard.It is solar powered so no batteries and no necessity to hook up to a power though a cord and plug are provided if you choose to do so.ConsNot perfect accuracy but to be fair, probably within the specs provided. I checked each tire with a known gauge. Two sensors are about 2 pounds low while a third was pretty much spot on. I used the third one on the spare tire and am not using the fourth.To preserve battery life in each sensor, they are motion activated and then only transmit if there is a change in pressure (and I think temperature). That makes sense. However, that also means that you cannot check the cold tire pressure before heading out. I'm told with trailer tires this is important to do. The only way to check the pressure is to unscrew and remove the sensor, check the pressure, and then remount the sensor. You lose a little air as you take it off and then again when you remount it. The instructions say you really should check with soapy water when you install a sensor to make sure you don't have a leak. You are also supposed to loosen and then re-tighten the locking nut behind the sensor. Note this is not a fault of this system as I assume this is the case with all of these externally mounted monitoring systems. I wish there was an override button on the sensor to manually get it to send a reading. That would make it easy to check pressure while still retaining the protocols to enhance sensor battery life.The motion activation and only sending a signal for significant changes also seems to lead to unpredictable first reads. On my initial trip that was on a smooth interstate, I got the first tire reading after about 10 minutes but the second tire reading didn't show up for nearly an hour. The reading for the spare was closer to 90 minutes after I left. If I knew the pressure was correct when I left, i suppose that would be ok, but as noted above, you don't know that unless you take off the monitors and check with a gauge. In my view, the system should be set up to send an initial reading at motion activation. That would also let you know that system was in fact working. This system does not do that.I camped in Colorado at a high altitude (8,600') with cold nights. When I left in the morning after a few days, I assumed the pressure was lower. I didn't bother to check since I had no way to add air anyway. In this case, all three tires reported right away as I drove out the dirt road within the campground.I've read that there may be external sensors with pass through channel that allow pressure checking and adding air. That might be an option to consider.Conclusion is that while not perfect, this system does give me some peace of mind that i will notice if a tire is rapidly losing air. For $60, that's well worth it. I'll continue to look at other systems for future consideration.

In 2020 I bought one of these for my first big trip with a new travel trailer thinking, at the price point, that it would be a relatively disposable item. I just wanted it to get through that trip. Well, 5 years later and now using it with second a larger travel trailer and this little dude still works. It has saved me from disaster on one occasion, when a tire failed. We were able to get off the road safety to change it before it went completely flat, damaging the rim and potentially the camper. $60 very well spent. Highly recommend.

I purchased this unit for my 26 foot RV trailer. As I installed the sensors, one by one they appeared on the screen. All seemed well. Once I was done, I put the unit on my dash - In the direct sunlight as recommended to use the solar feature and I immediately realized that the screen was pretty much impossible to see in the direct sunlight.I then left the unit on while I left the RV in the storage lot. I drove the entire 20 miles back home and the unit continued to display the sensor readings. Clearly this was incorrect, but this presents a major problem.I contacted their support folks are reviewed these problems. They claimed that yes the screen is hard to read, but 'you don't need the screen as if there is a problem with lost air, it will beep'. Hmm, that's reassuring.Then about the lack of disconnect alerts, that was also explained away is not a problem as they will keep the last reading until they reconnect. Well yes this is a problem if they don't ever reconnect. And for that matter, how do you know if they are connected or not? I was told not to worry about it.Well, when I went back to tow the RV, I put the unit on the dash and turned it on. It never was able to read the sensors that were probably 25 to 30 ft away. When I took the unit out of the truck and walked them back by the sensors, they connected. I then brought the unit back to the dash and the sensors continued to read - so I thought.As I'm driving down the highway, I'm noticing that the tire readings are not warming up, and none of the readings are changing as they should. So I turn the unit off and wait a few minutes while still driving and turn it back on. No connection.So the entire time, it was just reading the connection values when the unit was back near the tires, but never let you know that it lost the connection. So how would you ever know if you are indeed connected in the event you have a lost air condition.Unfortunately, the business knows these are mission critical problems rendering these things as worthless for their intended purpose, and spends a lot of time trying to convince people that the concerns are unwarranted. This is going back. Total waste of money. I just cannot fathom that folks are rating these Tymate products so highly. They simply don't work, but folks probably don't even know it, which is a huge issue. Avoid.