It is tricky. Because it recommends put the device in the middle of your house to extend the wifi to the front door. So I have a large house. Two bedrooms in the back and two bedrooms in the front of the house. The den is in the middle. So with this extension wifi is in the front bedrooms where it was poor is now good. It also depends where you have your router. It recommended to be close to router. I hope it gives you a sense of the range.