Because I have a relatively modern TV (SmartTV by Samsung), which can also play photos, videos and music, and even an extra USB port (which delivers enough power) for external hard drives has, I wanted to use the function of course. In operation I have allerings two external hard drives and both without external power supply. Thus, if a connected from the plates to the TV and turned chalet the device, the disks begin naturally to run directly. Especially when you do the TV several times a day from us, also the plates would then of course permanently switched off with one and. This is unnecessary at the expense of life and makes for me no increased sense. So I looked around for a USB cable with a switch that basically works! So like a conventional power strip. Although I had never heard of such a thing, but most of you are not luckily the first one so encounters a problem ... Bonus point of this product was to me then that I get 4 USB ports, each with its own switch here. I had first sought only by a single cable, but why not connect multiple devices at the same time, if the technology it will bear. The build quality is OK, each of the four ports has its own blue status light that indicates whether the jeweile connection is currently active. The supply of the stroke itself is a subtle blue LED display my. As so often with "Verlängerunsgkabeln" and the like, the cable is likely to be a bit longer, but it is basically no problem, if one uses the device anyway right next to the computer, television, etc., just as there certainly is common. If I so want to see the contents of the hard drive, I'll just briefly to switch on and everything works. Just as I had imagined. So all in all a good product for less money, which has at least entprochen my expectations exactly.