Ultrasonic Electronic High Power Pest Repeller. Repellent Mouse & Rat. Adjustable Frequency, From 18,000hz to 32,000hz. Covered up to 3,500 Sf. Perfect for Home, Warehouse, Restaurant, Garage, Basement, Attic and Storage. The Most Powerful Pest Repeller. Made in Taiwan. For commercial use please search "Pest UP-11K". For Home Use please search Test Button: After plugging it in with AC adapter, a red LED indicator light on the front of the unit will light up, letting you know that it is functioning properly. The test button behind the unit is used as a testing mode so that you can hear the unit sound off and ensure that is activating. Spacious Places Available: The ultrasonic sound emitted by the PestKicker can travel up to 3,000 ~ 3,500 square feet in an open area; however, the sound will not penetrate solid barriers. Designed in Japan and Made in Taiwan, all the parts from Japan and Taiwan. Notice: Commercial Use:May not suitable for use around pets, infants, small children, and anyone with sensitive hearing. For In Door Use, Guarantee works.