Very good product. effective even at long distance. it's been over a year since I bought it, I have not had any problems. even during power outages, he starts one way. We have a workshop at the back of the house in an outbuilding, and repeater done very well over. Without him, the only obtion we had to have a phone in this building was to open a new line. Now I can transfer calls or just join my husband without issue. I recommend this device.