Electronic Audio Deterrents, like Bird Gard, protect your property and crops even when you aren't there. These automatic units project digitally recorded sounds of wildlife in distress and predator calls across the protected area - convincing real birds that there are predators in the area. Bird Gard has over 120 different sound chips available that can be set to target any of North America's pest bird species. Agriculture and Industrial locations use Electronic Repellers to create a control area around their property. Combining Electronic Audio Deterrents with other deterrents like pyrotechnic scare cartridges multiplies the effect of each product, creating the strongest deterrent for your dollar.