It works as advertised. You need to be sure to plug in the power source first, then hook up the HDMI to an activated screen, then boot up the switch. It seems to have problems detecting if the switch is already on. At first, I had my switch on and tried to connect the adapter and HDMI to a TV, with no result. I then added the power source, to which there was a message on my switch saying, ""Unable to charge,"" as well as no picture. Be sure to connect everything prior to booting up the switch.