Tablet Case Help

I am new to the world of Tablets. I am getting a 7 inch Tablet for Christmas and I thought I would get a case for it ahead of time. I got one on Ebay and it just arrived and I have some questions about it. This is it. Midway on the page you will see seven different views that has some USB wires and a switch for the battery in the case. How would these work with the Tablet. You will notice that the price says $114.99. I don't know about that but I only paid $14.99 for it. Any help on the different features is appreciated. Thanks,

I think that the battery in that thing provides power to the tablet through USB cable (included). As it is a battery-powered USB port you can use it to recharge most other devices as well. (not apple stuff as they added a gimmick to detect if the USB is of one of their own chargers, not that you cannot DIY your own spoofer for that, but I doubt they included it in that device)

Thanks for your reply