VEVOR 24" Pressure Washer Undercarriage Cleaner, Stainless Steel Surface Cleaner for Pressure Washer, 4000 Max PSI, Angle Adjustment Gear, 7 Spray Nozzles, 2 Extended Wands for Driveway, Patio, Deck

Is there a minimum recommended GPM for this product (undercarriage cleaner on wheels)? I am looking at getting an electric pressure washer with too low a GPM to spin a normal surface cleaner.

What is the height of the wheels on each end?

Can I use this to clean the undercarriage on my 2015 Lexus suv?