Quad Bl aster Bird Repeller for Enclosed Areas Like Warehouses and Hangers Industrial strength birdblaste r ultrasonic pest control device for bird pests , bats, rats and mice. Install Quadblaster QB-4 by Bird-X in enclosed or semi-enclosed areas hangers, warehouses, plants, tunnels, loading docks, breezeways, boat houses, underpasses, storage sheds, barns, sports arenas, convention centers, parking garages, car washes, etc. Mount at the level where birds perch. Effective coverage is up to 6400 feet or 80 feet by 80 feet if unobstructed in an indoor area. How Bird-X Quad Blaster Bird Repeller Works Solid-state electronic circuitry produces harsh, but harmless, UHF sound waves too high for people to hear. Sounds targeted at overhead bird infestations annoy birds. Four powerful Piezo ceramic speakers , placed 90 degrees from each other, produce an overlapping of sound for full 360 degrees coverage for bird control. Four Settings Constant 20 kHz by modulation between 20 and 30 kHz at different speeds or Combination mode, alternating constant and output in 12 second bursts. Sequenced speakers in rotating order at speeds from 10 to 110 rpm. Two red diodes indicate rate of and speaker sequencing. Four green LEDs show each speaker's sound output. Features Low-profile, contemporary housing of sturdy, durable steel. 110 vAC Power, using less than 10 watts of power, costs pennies a day to operate. Uses enclosed or semi-enclosed areas. Repels birds pigeons, sparrows, starlings, swallows, gulls, blackbirds, crows, grackles any pest birds. Repels bats, mice and rats also. Routes pests away from hangars, warehouses, plants, tunnels, loading docks, breezeways, boat houses, underpasses, storage sheds, barns, sports arenas, convention centers, parking garages, car washes, etc. 360 degrees Coverage. Four speakers blast out overlapping fans of ultrasonic sound in all directions. Mounts in any d This item ships from a separate warehouse and may require extra time for delivery.