General description While other bat repellents aren't pet-friendly, don't really work, and smell bad, the Pest Destruct Ultrasonic Bat Repeller works silently on the human ear, is odorless, effectively repels bats, and is 100% safe for children and pets. This ultrasonic bat repellent operates on a biological level by emitting ultrasonic waves to deter bats and other unwanted pests, including mice, flies, insects, mosquitoes, fleas, and cockroaches. Each unit covers an area of 100 to 800 square feet. Technical specifications Voltage: 100-240V AC, 50/60HZ Power: 2.5W Audio Output: 20-65KHz Other information No external environment, hot, water, or other liquid or moisture should come into contact with the device.