Bests & Worsts Reviews from Amazon

It's winter so not a lot of insects or roaches or rodents roaming around so I don't have an immediate result to report. However, with the help of a ultrasonic detector app, I was able to actually show the sound waves produced, in each of the 3 settings. Just want to point out that in the red setting there is a high pitched audio tone as well, and you do feel some strange discomfort if you stand close to it. High frequency soundwave doesn't carry very far and the feeling went away if you move about 30 ft away.