Bird repeller won’t disturb humans

QuadBlaster QB-4 repels birds using ultrasonic sound to eliminate the expense they cause and the mess they create. Speakers project powerful sound waves in an overlapping fan pattern for 360-deg coverage.
By Staff April 1, 1998

QuadBlaster QB-4 repels birds using ultrasonic sound to eliminate the expense they cause and the mess they create. Speakers project powerful sound waves in an overlapping fan pattern for 360-deg coverage. The frequency level irritates birds, but humans can’t hear it.

Bird-X, Inc.

www.bird-x.com