Question about ASUS ZenDrive U9M

I was finally able to watch the restored version of the film DVD "La Guerre des Boutons" (War of the Buttons) on the 27" Mac - wonderful! The Asus is obviously good. It's a great service that it comes with two cables. One with a Y, which can be used to connect an additional mains adapter if required. The price is much lower than the original Apple!