I actually returned this item as I thought my old one was ruined after a bad thunderstorm, but tried the power cord from this and my old one worked still. I bought new DC power supply. I can say this is an amazing signal enhancer as I have no signal at my home in the country at all, but with this enhancer I have between 3 bars and full signal depending on weather,  and times of day when the airforce is flying planes around our home (we live 8 miles from afb). when they are flying at certain times of day our signal suffers a lot, but at least with this device we have signal, phone and text works great, but Internet suffers a lot when the planes are flying neat by