Mains adapter stabilised switchable output voltage with ic control technical data output voltage 3 v 45 v 6 v 75 v 9 v to 12 v reversible polarity 5 x dc 1 x phone jack 9v clip short circuit protection overheat control a first class adapter that you shouldnt be without ideal for mini pcs cassette players radios keyboards etc 650 ma mw 650 gs by 12 v 590 ma