A complete waste of money
I purchased three of these devices specifically to deter pigeons from my terrace, based on the claims made about their effectiveness. I tested them at different frequencies and settings and, after more than a year of use, they have had absolutely no effect. The pigeons continue to land on and use the terrace exactly as they did before, showing no reaction whatsoever to the devices. Having purchased three units and used them extensively for over a year, I can only conclude that, in my experience, the product does not perform as advertised. A complete waste of money.
By R M.