I also went with TST 507 unit and it works perfectly...........once I called Support and got them to set it up for me. The guy was super helpful and did guided me thru the whole thing. I installed the booster under the pass thru as there was handy 12v right there. I didn't get the color screen for some reason.......oh well. Tucked the monitor over in the left hand corner of the wind shield. Very nice product. I may upgrade to the internal sensors when I get new tires...........