High and Low settings for TST Tire Monitoring system

I told TST exactly that.

Funny thing. The TST receiver's battery failed on that same trip. The TST would work as long as it was plugged in, but would die immediately when unplugged. I called TST to find out what battery it was so I could buy a replacement battery, but TST said that even though it was out of warranty, they would send me a new receiver anyway. During the conversation, I told them that it had saved my bacon that very trip.