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

I don't leave reviews often, but this is a great product. I've had this product for 4 years now. I have used it on 3 different trailers, and the batteries are finally needing to be replaced in the sensors. I have probably 15,000 miles of towing all over the United States. I've towed 20 and 22 foot trailers behind HD trucks and even a 28 foot motorhome and the sensors have connected with the head unit. I have only plugged in the main unit a few times. I just leave it in the dash where the sun can charge using solar and it's always ready to use. This product has exceeded my expectations time and time again, and I have recommended it to many people. The pressure readings are accurate, and the range of connectivity is excellent. The price, quality, and performance is excellent for what you receive. If this one fails I will purchase another without any concerns. It provides a lot of value information and provides piece of mind when towing trailers .

Very easy to set up and been working really well.

Expensive and low speed when switching ON the instrument to identify the four sensors.

The unit is really easy to setup and use. I fully charged the Head unit which didn't take all that log, using the provided USB "C" Cable and should stay charged from here on using the built in solar cell on the unit. The unit was already "Paired" to the already configured sensors. LF, LR, RF, RR The only reason my rating isn't higher is for the following. 1. The sensor for the RR would display any info. Turned out that the battery on the sensor was dead, I checked it with a battery tester. 2. The enclosed manual says that the sensor battery is a CR2032 which it is not. it is a CR1632 which is a slightly odd unit to get at your local store. 3. All the sensors were active and powered on, using / draining the batteries while sitting new in the box. 4. The unit does not turn itself on or off. If you don't turn it on, you have no monitoring or alarms. If you leave it on for long periods of time, it may be dead if the sun isn't strong enough or you have parked in the shade etc, once again leaving you without monitoring or alarms. One thing I'm interested to see is how long the Lipo battery holds up. Usually in low cost items like this the LIPO battery is on of those inexpensive bag types that doesn't take heat or especially freezing temperatures without being killed. UPDATE I have left the unit turned on for several days in a row. Even in low lighting, like overcast days, its still enough to keep the units battery charged. so that is one concern that is resolved, Update 2025/12/30 I now have 3 units on 3 different vehicles and they all work great and there is no issues with one unit reporting to the wrong vehicle.

I bought it last April and i just start using it now, it doesn’t work