I bought the 4 sender Carchet system for my Toyota for the rear duals. I went with Carchet as they seem to be the only one that has much info online and replacement sensors can be purchased for.
It is a cheap setup and not NASA accurate for psi, you become accustomed to the inaccuracys. I have tested it numerous times and too low of pressure or a quick falling of pressure will set off the alarm without fail.
This is the third year I have had it, it has detected one quick release of pressure that I would not have noticed while driving. And now something is wrong with the display it is not showing one tire.
Before buying a high tech, super deluxe system check the price of battery replacement, up to $50 per sensor!
https://www.ebay.com/p/CARCHET-Car-TPMS-Tyre-Intelligent-Pressure-Monitoring-System-4-External-Sensors/2286669655?iid=182325896577&chn=ps