Big/Wide Screen TV Questions

[Babyboy]

Ive been intrested in buying one of these for a while now but i cant understand how it works.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=47103&item=5542363559&rd=1

Now too me it sounds like all there saying u have to do is attach the lens to any TV of your choosing and it makes the picture bigger with decent quality?!?! That's too good to be true. But im worried, what is a projector len's exactly let alone a projector?? and if im wrong about what i just describe about being that easy to setup, could someone tell me how this would work becase im kinda skeptikal and wanna know what i have to do before actually buying it.

 

[FreeDoM]

You can buy it on the official website (which i forgot) for 17 dollars. There it says installation takes an hour or so. It does look good but heres how it works. It's basically a huge projection screen, it uses the existing light and image from your tv and then projects it out on to the bigger screen. The quality looks good but i heard that it might require dim lighting to work best. I think it can be set to any size, but the max is 127 or 137 inches.. i forget which

 

[Babyboy]

You can buy it on the official website (which i forgot) for 17 dollars. There it says installation takes an hour or so. It does look good but heres how it works. It's basically a huge projection screen, it uses the existing light and image from your tv and then projects it out on to the bigger screen. The quality looks good but i heard that it might require dim lighting to work best. I think it can be set to any size, but the max is 127 or 137 inches.. i forget which

Ok when you say a huge projection screen? do you mean like the screen that they use in the movie theather or is it similar to the screen your current TV has and its just bigger or what?!?! Sorry just having abit of trouble comprehending this. And i wouldnt need a movie projector or any of that stuff would i?