I plugged to add an extra HDMI from a numéricable decoder then an adapter TNT and nothing worked properly. By connecting the two we have taken no sound or display on the two TV stations; by connecting a decision was the image that is cut on the TV and sound sizzling by the time it works correctly. I used cables short (90cms), they are not connected directly involved because everything is fine. It's a shame because with a splitter without power connection would have been handy, but given all the negative reviews of this product without notice and "No name" I did not deceive myself.