Ultrasonic Bird Repeller Outdoor Balcony General Purpose Bird Control Device for Pigeons Swallows Eagle Ducks Effective against Many Birds

I bought this to keep the birds away from the rooftop where I've planted some greenery. The birds have been a bit of a nuisance, leaving droppings everywhere, especially with the new year approaching and cleaning being a hassle. I started using it right away, and I've noticed a decrease in bird droppings over the past few days. I'll definitely keep using it.

The sound is acceptable, and after using it for a few days, I've noticed fewer birds around. The results are pretty good!