[tentcamper]

Bill, I just got the kit with 4 sensors. I plan to use one on the spare tire just to keep track of the spare PSI so I don't have to craw under the camper. I have the extra sensor as a spare sensor.

I got the innoTechRV TPSM with 4 sensors for $220 on amazon. It looks like its identical to the tireminder TMG400C-4B. I did check with the support center and they said it would work with 2-3 tires. Waiting to test it out on my TV before camping season.