Hunt destructive birds ...

I must say first that this product works ... at least for birds for which I bought.
BUT,
-it must recharge the batteries regularly, solar collectors is insufficient to keep the load time.
-The effective range is quite small (7-8 meters), it may take 2 or 3 for "cover" a garden.
-the frequency setting is somewhat intuitive, this would be to also specified in the instructions.
In short, the birds seem aback then fly without being traumatized and neither dogs nor cats are bothered by a low-frequency ...