They went down the road to get my caravan. The alarm went off. There are no problems with the tires, the signal from the transmitter to the receiver has disappeared. I tried to reset the one that was to be departed. No do not go. When I got home I had to remove the transmitters, reconfigure and repeat the whole process. On the next trip, other transmitters lost the signal and the alarm went off. Have since taken it off the trailer and probably won't be using it.