Sonic repeller uses high-frequency digital recordings. Covers up to 6 acres. Version 1 repels pigeons, starlings, sparrows, and gulls. Version 2 repels crows, blackbirds, grackles, cormorants, and ravens. Version WP repels woodpeckers. The Bird-X Super BirdXPeller Pro is an effective, eco-friendly and human way to rid your property of pesky birds quickly. This supersonic audio repellent is safe-to-humans and operates by emitting naturally recorded bird distress sounds and predator sounds that confuse and disorient birds up to six acres. The BirdXPeller Pro is customizable for your specific needs and comes available for a variety of needs; version 1 repels pigeons, starlings, sparrows, and gulls; version 2 repels crows, blackbirds, grackles, cormorants, and ravens and version WP repels woodpeckers. Safe for outdoor use, this device features a NEMA-approved weatherproof casing, and four speakers each complete with 100 feet of cable for strategic placement. ABOUT BIRD-XEstablished in 1964, Bird-X has become the leading brand of humane pest and bird control solutions worldwide. With a drive for innovative product development, Bird-X aims to produce high-quality repellent that aligns with sustainable, eco-friendly and humane practices. Bird-X devices are proven to help wildlife and pest populations by migrating them to where they can be controlled and are free from harm.