Don't believe everything you read.
I bought one of these from an Amazon Site about 4-5 months ago and managed to lose it somewhere.
God, I could have screamed, when I recieved this one in the post. I bought it knowing I was going to spend 3-4 weeks in hospital and really looked forward to watching a few movies on their nice 'big screens'.
However, when I plugged this into my iTouch, I was greeted with the message, "This accessory is not optimised for use with this product.
I can't even remember who I got my original one from.
Beware of cheap immitations. You could get more (or less!!)than you bargained for.