Repeller, repellent, scarecrows of birds, birds and small rodents.
This bird repeller has two functions.
One repels the birds with annoying ultrasound.
It has another function that mimics the notice of birds in danger.
Interpolate these sounds randomly along with that of a bird predator.
The app has a timer that you can program.
* Do not let the birds bother you. Use this repellent, repellent, scarecrow.