hi tim43.i have a set .bought them before i came to texas from ontario.they are not the easiest to set up the directions are not that good .you have to play with the system to get the hang of it.half way to texas i had an alarm go off.it said battery on left back tire of the trailer.everything was okay but every time i reset it after a day it goes off again i am parked not moving.also tried finding the same batteries have been hard.i guess i well have to phone them.best of luck with yours.let my know how you make out maybe it just me
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