describe: 1. Voltage: 100-240V AC, 50/60HZ 2. Power: 2.5w 3. Output audio: 20-65KHz Electrical plug-in device: Do not expose it outdoors, to high temperatures, to water or other liquids, or to moisture. Coverage range is 100 to 800 square feet, with no obstructions in front of the device that could block ultrasound waves. While other bat repellents are unfriendly to pets, don't work, and smell bad, Pest Destruct Ultrasonic Bat Repellent is silent to the human ear, odorless, perfect for getting rid of bats, and safe for children and pets. How It Works - This ultrasonic bat repellent works on a biological level by emitting ultrasonic waves to send bats and other unwelcome guests back into the wild. This means there will be no dead bats, rats, mice, flies or bugs in your house to clean up The size of a unit ranges from 100-800 square feet. Enjoy living in a pest-free home - while this ultrasonic repellent is specifically designed to get rid of bats, it is also suitable for getting rid of bats Mice, rats, flies, bugs, mosquitoes, fleas and cockroaches. Package Contents: 1 piece of insect repellent