When I talked to the Tire Patrol People a year ago they claimed their system was made in the USA including the circuit boards.
But I have two issues with the Tire Patrol.
First it is out of stock and has been for the last 6 months.
Second when the system sets overnight the sensors go to sleep and do not wake up until the tire rotates.
I like to check my pressures early in the morning before the sun gets to the tires.
Then if there is a problem I have time to correct the problem instead of finding out after I have gone down the road a piece.
Of the systems currently available that I am aware of the Pressure Pro is the best system.
I particularly like the 15 minute notification of a lost signal and the ability to measure the signal level from the sensors with the Pressure Pro.