Don't waste your money. I bought this after my fifth wheel broke last year, thinking it might save me money in the long run. Found it's cheap and unreliable. My sensors only updated the display once, after which they just cycled through the same previous readings. I've tried resetting them all multiple times with the same result. It lost signal, including the alarm, about every 30 minutes, leading me to believe I had an issue, which is annoying when towing long distances. I recently had the last straw when another motorist told me that I had been driving with a full puncture for at least 20 minutes while the display and gauge were still showing 95#. Then on the same ride I checked the tire pressures more closely to find that the rear tire on the same side was slowly leaking from driving into the steel belt of the blown one, but the TPMS didn't detect it, not even at 25#s . I will contact the company for a refund.