The Pest Free Zone Dual Wave Ultrasonic Pest Repeller uses 2 alternating ultrasonic frequencies creating a sweeping effect to drive out pests. The ultrasonic wave frequency ranges from 20KHz to 40KHz and 40KHz to 60KHz. It has a coverage of 900 square feet.
Two alternating ultrasonic frequencies
900 squre foot coverage
Drives out the pests