Using the Attack Wave Pest Repeller is easy. Just plug it into a 110V power outlet using the included adapter. Place it in an area where you've seen rodent activity. For best results, keep it at a height where the sound can spread well. Make sure there are no large obstacles blocking the sound. Remember, this repeller is for rodents only and won't affect other pests. It's safe around humans and non - rodent pets, but still, don't place it right next to where people or pets sleep. There's no need for maintenance as it has no moving parts or chemicals. If it stops working, check the power connection. That's all you need to know to keep those pesky rodents away!