Flowtron FC 4900 Portable Fly & Insect Control Multi purpose design allows use as a portable free standing unit or wall mounted Covers up to 500 sq.ft. Flys are quickly lured into unit by special black light bulb & pheromome impregnated adhesive board where the are quickly traped & die Ideal for off hours operation and special problem areas such as bathrooms ,kitchens Great for confined spaces