Purchased the following on Amazon in June: "TireMinder Smart TPMS with 6 Transmitters for RVs, MotorHomes, 5th Wheels, Motor Coaches and Trailers". Install was fun for the inside rears, but I have a long reach. This one uses your smart phone as the monitor but they also have the version where it provides you a monitor. I took it out about 5 times since the purchase and I think one time one of the sensors acted funny until I cycled the power. I like the piece of mind
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