Save the headache, go up one size to the galls street thunder. I bought this remote siren so it was less noticeable (I drive an undercover unit). Had it professionally installed, It worked, maybe 3 weeks, with very limited use, & then started popping fuses. I had to buy another Unit, just to get this car back in service. Now I have to mail in the broken unit, & have it repaired. Now, I'll have two sirens, for one car. Total for two 99.00 sirens: 330.00 dollars. The best Galls could do for me was free 2 day shipping. Very good customer service, but the product wasn't worth the metal.