do not waste you money . all cable company provide these item for free plus free installation . for those who insist on own one , beware : the modem do not last long . at most 2-3 year and than burn out . happen to I 3 time , the first last a few month , the second 2 year , the last almost a year , when it finally dawn on I : call Com ... they come , install , hi-fi have everything . beautiful !! no more worry .