The Ninja Plug-In Bug Zapper creates CO2 that attracts insects to the trap where they are eliminated on contact. Ninja Plug-In Bug Zapper is child and pet safe plus it emits a pleasant blue glow that works great as a night light. Use indoors in dens, kitchens, garages, or basements. 5 ½ "W x 5 ¾"T x 1¾"D".