Powerful ultrasound: Outdoor cat repellents have powerful ultrasonic to repel animals. Interfere only, do not harm animals. This cat repellent is the fastest and most effective solution to cats, dogs and other pesky pests in the garden. Easy installation: attach stakes to the unit and plant the unit on the soil you think will be most beneficial. There are two hanging holes on the back of the device so you can hang it where you want to scare animals. (Recommended width: closer to the ground, for more effective detection of small animals.) Best position: keep the device parallel to the intruder). Note: The data is all measured manually, please allow 1-3cm error, due to the difference Due to light and display, there will be a certain color difference, the actual object received shall prevail.Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.