Works perfectlyThey work great!Herding moles......Well, they seem to work.... my husband keeps moving them around our 1 acre grass area and the moles seem to be moving from them.This year we got invaded by moles so we are trying to get them to leave our property.Time will tell if it makes them leave altogether but for now they have left the areas where we put these!Easy to useThese are easy to install. They also have an on-off switch for the cold months when snakes are less active.I bought one of these from a local store before buying 6 more from you. After I assembled them and inserted into the ground, I kept checking them and listening for the beeping sound they make. A couple seemed to be working, while some probably never did. I began to notice more trails and holes in my yard and finally took them out of the ground and none beeped any longer. This happened within 2 months. Dont waste your money. By the time I figured out they were not working, my warranty was expired.Product works as advertised. They are keeping the moles out of my garden. I know they work because I still have moles in my yard outside the range of these repellers.Product was easy to use we just dug a hole and buried it in it.