DESCRIPTION: Deer Shield uses the natural survival instincts of deer to effectively repel them from vineyards, orchards, airports and landscaping. Digital recordings of alarmed, aggressive, hostile and territorial deer are broadcast through a high-fidelity weather-resistant speaker to trigger a primal fear and flee response. Deer soon relocate to where they can feed without feeling threatened. Deer Shield includes the control unit with horn speaker, built-in motion sensor and AC adapter, and it retails for $250.