The Repellio Pest Repeller is designed to emit high-frequency sounds that are intended to deter pests without the use of chemicals. However, it's essential to understand that these ultrasonic waves can have varying effects on different species, including pets and humans. Many users have reported noticing changes in their pets when the device is in operation.

Some dog and cat owners have observed signs of discomfort or agitation in their pets, suggesting that the sound may be more bothersome to them than anticipated. While the device is marketed as safe and eco-friendly, it's always a good idea for potential users to monitor their pets’ reactions when using the device for the first time.

In conclusion, while the Repellio Pest Repeller offers a chemical-free solution to pest control, it's crucial to consider the potential sound side effects it may have on your household. Being informed and prepared can ensure a smooth experience with this pest repelling technology.