Pruis A/C compressors DO NOT LIKE TO BE USED IF THE REFRIGERANT RUNS LOW IN YOUR A/C SYSTEM.Electronic leak detectors, If your Pruis has a refrigerant leak the shop you take it to should use a leak detector like one shown here first not just a UV light and trace dye, This is only about 10% or less of the electronic leak detectors i'v owned and use. The best are bad none the H10 s. But many dont like them, too hard to use, you need a brain, some skill, some time to learn and be able to learn, oh yea have some one with years + who been using them to teach you to. They have some qurks , and they drift and a few other things but no other detector ever worked so well. All new stuff is CRAP!!! but they have some use to, to be used in conjugation with the good old H10. The newer H10 with batteries was not so good but ok. at $400+ each . The TIF are GARBAGE and CPS and a few others.