There are a lot of electronic repellers nowadays that positioned by manufactures as "insect repellers". But inly some units of them are really work on mosquitoes, roaches, spiders and other insects. It's too hard to repel insects using ultrasonic waves – you'd better to purchase poisons, traps and zappers to eliminate them. But first we want to show you the best insect repellers from Amazon.com. Our reviews of them are based on customers reviews and we recommend to read them.