Loading... Please wait...This little solar powered gadget is a great idea! The mosquitos that bite are the pregnant females looking for nourishment for their soon-to-be-born young. The Mosquito Annoyer deters these pregnant female mosquitos by producing the sound of a male mosquito. Estimated to be about 90% effective by the manufacturer. Small, lightweight, barely audible, solar powered with a battery backup for cloudy days, and reduces the need to use harsh chemicals used in other repellants. The Mosquito Annoyer really does work and you'll be glad you gave it a try.