While other bat repellants are not pet friendly, don"t really wk smell bad, Pest Destruct Ultrasonic Bat Repellent wks silently on the human ear, has no od, completely eliminates bats, is safe f children pets. How it wks - This ultrasonic bat repellent wks on a biological level by sending out ultrasonic waves to send bats other unwanted guests back to nature. This means no dead bats, rats, mice, flies bugs f you to clean your house, a unit covers 100-800 square feet. ENJOY LIFE IN A PEST-FREE HOME - While this ultrasonic repellent is designed to eliminate bats, it"s also good f mice, rats, flies, bugs, mosquitoes, fleas, cockroaches. We are real people who use our own products every day. We want the best f our families, we want the same f yours. Product Specifications 1. Voltage: 100-240V AC, 50 or 60HZ 2. Power: 2.5w 3. Output audio: 20-65KHz Electrical plug-in installations: No outdo, hot, water other liquid humid environments. Covers 100 to 800 square feet with no obstructions in front of the unit that could block the ultrasound.