About this item Bats Be Gone: Using high-frequency ultrasound to disrupt their auditory perception and nervous system, causing them to lose their ability to determine direction, and therefore feel scared and leave. Suggest Continuous Use: Use the ultrasonic bat removal continuously for 3 weeks to achieve results. Due to individual and environmental differences among bats, the effects may vary. Please be patient and continue operating until the bats move away. Friendly to Humans & Pets: The bat exclusion device uses specific high-frequency sound waves to keep bats away. This method does not contain any odors or sensitive ingredients, and will not harm humans or pets, nor will it harm the bats. Tip: Walls, cabinets weaken ultrasonic waves. When indoor objects are dense or the space is too large, it is recommended to add multiple equipment units to ensure comprehensive coverage and improve the efficiency of the bat away system. Strong Practicality: The ultrasonic bat deterrent has a simple and elegant appearance, suitable for various sizes of space environments such as attic, garage, terrace, eaves, porches, etc. Worry Free Purchase: If you have any quality issues or questions about the ultrasonic bat scare devices you receive, please feel free to contact us at any time, and we will provide you with a 100% satisfactory shopping experience.