As said, it is perfect, well built, totally silent (in a room where you do not want noisy switches, here is a winner), it does the job with no issues at all. Two in into one output, or one in into two outputs, with no flaws. Please, remember to disconnect the jack that switches the unit on, so that you do not drain uselessly the batteries, they will last for a long time (100 hrs) if you switch it off.