Amazing electronic bird repellers warning chirps and trills drive away flocks of birds in an area up to 1 1/2 acres. It uses distress calls of birds to repel 8 different types of birds including woodpeckers and house sparrows. Great for large gardens, buildings, airports and much more. U.S.A. Automatic Day, Night and 24-Hour modes with light sensor Volume control and time off switch Waterproofed for use year round 110 Volt/220 Volt AC power adapter with 50-ft. power cord