Electronic goose repeller targets pesky Canada Geese and disturbs them with natural sounds. Geese understand the natural vocal communications as signals to leave the area. The system features adjustable controls including volume and timing. Natural Goose alarm and alert calls repel geese from up to 6 acres. Ideal for use around bodies of water and open grassy areas. Perfect for lakes, ponds, golf courses, parks, corporate campuses or anywhere geese are a problem. Durable construction makes this system weatherproof and commercial quality. For residential or commercial use. Includes 4 weatherproof speakers.