I buy this because my cable signal for internet be not stable at all . during the rainning day or windy day , I get no connection . after install this , it significantly improve my connection . however , when the incoming signal be way too low , it still can not solve the problem . however , I can immediately feel the difference between with and without this booster . I even buy a second one as a Chrimstmas gift to my friend , which he also feel the improve of the signal .