Product 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, kills bats perfectly, and is 100% safe for children and pets. How It Works - This ultrasonic bat repellent works on a biological level by sending out ultrasonic waves to repel bats and other unwanted guests in nature. This means you can't clean your home; one unit covers 100 to 800 square feet. Enjoy life in a pest-free home - although this ultrasonic repellent is specifically designed to kill bats, mice, flies, insects, mosquitoes, fleas, and cockroaches. We are real people and we use our own products every day. We want to provide the best for our family and we want to do the same for yours. Product Specifications 1) Voltage: 100-240V AC, 50/60HZ 2. Power: 2.5W 3. Audio Output: 20-65KHz 4. Resistance: No external environment, hot, water or other liquid or moisture.