Bird-Out, Aromatic bird repellent. Uses passive scent technology to disperse Methyl Anthranilate (MA) into the air to effectively repel all birds from outdoor and semi-enclosed areas. MA is a naturally occurring, non-hazardous food-grade ingredient that is widely used in various industries to give products grape scent and flavor. Repels all bird species including pigeons, sparrows, starlings, grackles, crows, woodpeckers and more! Bird-Out is humane, non-lethal, easy-to-use and will repel birds in a 20' x 20' x 20' area (8,000 cubic sq. ft.) for up to two months. Ideal for use on balconies, patios, outdoor eating areas, warehouses and other places where nuisance birds may congregate. Easy installation. Use included self-adhesive backing or hardware to mount on the desired surface. Twist and click the cartridge and place in the dispenser.