this coupler used with an HDMI adapter to RCA pc monitor allows you to connect an HDMI powered usb key works perfectly from a Samsung tablet, without loss of quality. the advantage is to use a monitor with no HDMI connection I just read my email, watch HD movies quailité without having to connect the tablet via the special adapter hdmi. Another advantage, it is not necessary to have the tablet facing the monitor. I recommend this coupler, which more costs only 2 and without shipping costs.