So far so good
These are so easy to install, just put in the sunlight or under a lamp to make their charge stronger, push the on button and then make a hole in the ground with a screwdriver and put this in it. It has eliminated chipmunks in the yard of which we had many, squirrels except 2 that insist on attacking the bird feeders, bugs in the ground that are eating the roots. These look good, you do hear a little buzz from each of them but it's not loud, I think it's funny and I put the out of the way but in the sunny areas to recharge, they are not in the way when I mow the lawn either. Great purchase.