The FlyWeb Fly light is designed for indoor use wherever there are flying pests. The FlyWeb attracts flying insects by using an energy-efficient 9-watt U.V. light. Flying insects are drawn to the U.V. light and trapped on the web-like adhesive glue card. Its compact size makes it perfect to hide while it still does the job of ridding your space of flying pests. Remove the protective coating on the adhesive board, insert it into the unit and the trap is set. All you need is an electrical outlet - plug it in. This product is sold in a case of 24.