Masoll M13 Tire Pressure Monitoring System, RV/Trailer TPMS with 4 Sensors | Solar Charging, Auto Calibration, LCD Display, 0-99PSI, for RV/Trailer/Truck/SUV/Sedan

​I picked this up to keep tabs on my tire pressures without having to manually check them with a hand gauge every single week. This Masoll system has been an absolute lifesaver. ​The best feature by far is the auto-calibration. Instead of standing there pressing a bunch of tiny buttons to manually program high and low warning thresholds, the monitor automatically sets your baseline when you screw the sensors on. It alerts you if a tire drops 15% lower or goes 25% higher than that point. It makes setup incredibly user-friendly. ​The solar display panel works perfectly sitting up on the dashboard. I haven't had to plug it into a USB cable once since the initial charge because the solar element keeps it topped off under daylight. The anti-reflective screen automatically adjusts brightness between day and night, making it easy to read in direct sunlight. The readings are fast and match my digital shop gauge perfectly within about 1 PSI. Highly recommend for the peace of mind.

this a great addition to traveling safe with a travel trailer, I can now see the air pressure, temperature of my trailer tires. the tire monitoring system is also solar powered which is great saved me over 200.00 as I was going to buy a system from gm. this system is easy to install and works like a charm!

I’ll buy a set of these before I ever buy OEM tire sensors. Work so much better and gives real time pressure. The display is easy to see and I have it mounted next to my rearview mirror. Doesn’t stay on when your not driving so you don’t have to worry about it being on 24/7 draining batteries in the sensors.

For anyone who wants to know when their tire pressure is low, this is the device for you. A few years ago, my original pressure sensors stopped working. I dealt with it for a while, but after getting new tires and trying to reuse my old sensors (which didn’t work), I needed a solution. I decided to give this unit a try, and I’m very pleased with it. It works as intended. I’ll be honest, I haven’t taken the time to learn all the features, but just being able to monitor my tire pressure is more than enough for me. One thing to be aware of is highway driving. After about an hour at higher speeds, the unit may start beeping as if the pressure is low. From what I’ve noticed, this seems to be due to increased tire temperatures at higher speeds, which can affect pressure readings. It might start with one tire and then move to others. Once you slow down or stop and return to normal driving, the system resets itself. One thing I really like is the windshield mounting with adhesive. It allows the solar panel to stay exposed, and even in low sun situations like overcast or rainy days, the unit still seems to pull in enough light to stay charged. After about four months of use, I haven’t had to charge it once with the USB cable. Installation was easy, but make sure you use all the included parts so the sensors stay secure and don’t walk off. Overall, a solid unit that does exactly what I need it to do. 👍

Easy to install. Worked well and provided accurate tire pressure and temp readings (verified with tire gauge and temperature sensor). Great value for the money.

I wanted to have a reading on my trailer tires and saw this product. Read some reviews and thought I would still give it a try. Very easy to read the size is good and the solar power is nice to have for long trips. Although I don't use it a lot it is nice to know the pressure and temp of the tires on the travel trailer. The sensors use a battery and I only needed 2 so I have 2 backups. I wasn't sure about the lock system but they work, it took a bit to get them off. Once you read the manual it makes more sense. I had it on bar and it took me awhile to figure it out and got it back to psi. The sensors do work well and easy to use, it does take a second or 2 to get reading, but the piece of mind is worth the money.

Easy to install and display easy to read.

Works great, easy set up except my rear right keeps thinking it’s on the spare and I can’t see it from the main screen. I am not too concerned because it should still alert. Great battery life, still gas 3 bars after a week in the center console

Easy to install, clear display, good constant monitoring.

عملي وجودة عالية

put it on my trike and works perfect with 3 wheels, tyvm

This product is really great and has exceeded my expectations. The installation is simple and the display is accurate.

Works really well !! Was warned today of a flat tire, highly recommended!!