I give one star because it's a great idea for anybody who has a phone jack in an inconvenient place. I bought this because I thought it would solve my need to move the base unit of our cordless phone from one side of a room to the other. Boy was I wrong! Great idea, poor execution! The transmitter and receiver are IN THE SAME ROOM and can't maintain a signal. It seems like the cordless signal interferes, which is ridiculous. I couldn't get a signal at all when I moved the transmitter to a different room. When you read the instructions, they give you a whole list of things that interefere -- why can they make a cordless phone that works throughout the house, but they can't make this work better?!