WHILE OTHER BAT REPELLENTS are not pet-friendly, do not really work and smell bad, Pest Destruct Ultrasonic Bat Repellent works silently to the human ear, does not smell, perfectly eliminates bats and safe for children and pets. HOW IT WORKS - This ultrasonic bat repeller works on a biological level by sending out ultrasonic waves to send bats and other unwanted guests back into the wild. That means no dead bats, mice, rats, flies or bugs to clean out of your house One unit covers an area of 100-800 sq m. ENJOY LIVING IN A PEST FREE HOME - While this ultrasonic repeller is specifically designed to eliminate bats, it also works on mice, rats, flies, bugs, mosquitoes, fleas and cockroaches. We expect the best for our family and want the same for yours. Voltage: 100-240V AC, 50 / 60HZ