It works for Washington state mosquitos. Sometimes it zaps for 20 seconds when it gets a big one. It almost sounds like it's going to burst into flames, but it doesn't. I feel a little better every time I hear one fry. FYI: be very careful with the attractant I got a little on me and it works really well. It did not help when I wiped it on my pants either. No more playing with the attractant while drinking.