Insect Killer 40W Powerful insect control: two UV bulbs emit powerful attractant ultraviolet rays that attract flies, mosquitoes and other flying insects from up to 80 feet away (more than 5000 sq. Ft. ). Powerful coverage area lures insects to the machine where they are zapped by a powerful 2, 800 volt shock Effective & large area coverage: mosquito killer, fly killer, bug killer (100% Satisfaction). effective for a large area of up to 5, 000 sq. Feet! Easy-to-use: easy to use and maintenance free; Simply plug in the bug zapper and watch the device eliminate all annoying flies. Dead insects are caught in a tray for easy disposal. For indoor use, or outdoors where unit will stay dry. Stands on its own or can be hung onto the wall with a chain Hanger (included). insects are collected in a removable and washable tray.