Stinger Indoor & Outdoor Insect Killer Combo - Total Home Defense Stinger total home defense kit, Bonus replacement light bulbs included Two separate units, one for indoors and one for outdoors Lures and traps flying insects, Attracting range up to 1/2 acre Outer enclosure prevents children, pets, birds and wildlife from contacting the electric grid. A 15 Watt ultraviolet light excites insects and lures them into the electric grid, where they are electrocuted and fall harmlessly to the ground.