I installed this in my ford van.  The sound level is plenty loud enough for me, as I want to keep people from walking behind me in the parking lot, not alert the people in the next state over that I am backing up.  The reason I don't like this product and can not recommend it is two fold.  First, the beep beep noise is actually like a beep beep squack squack beep squack.  The pitch changes all the time and it actually is embarrassing.  It was my fault that I called to inform the company about this like 6 or 7 weeks after I got it, as it was just not high on the list of things to do.  They have a year warranty.  Well, they want me to pay the shipping to return it.  I explained to them that while I did fail to call sooner, I am not a liar and the product was bad upon receipt.  I already blew 25 bucks on this piece of junk, so I'm not sure I even care to spend another $5.00 to get a replacement.  That is my experience and how I feel about this product.  I bought this item at etrailer dot com and because of the way they are handling the return I learned the hard way that I should have got it from Amazon and now I know where I will not be shopping.  It's not a huge amount of money, but I have to budget every penny I spend so it affects me more than someone who might have discretionary income.