Electronic Bird Repeller Coverage 900 sq. ft Frequency Range 15000-25000 Hz (Adjustable) Application This Low-profile Electronic Bird Repeller Uses Quiet Ultrasonic Sounds To Evict Annoying Birds From Any Outdoor Area. Signal Output 90dB @ 1m Overall Height 6-3/4 Overall Length 5-1/4 Overall Width 3-1/2 Material Weather Proof Polycarbon Housing Voltage 120vAC or 4 X 1.5v (C) Batteries Amps Less Than 200mA Watts 0.5 Cord Length 50ft Standards UL CE Includes Mounting Kit