This product is not an official guitar hero product. This guitar does not pick up all the notes and often plays double notes when only one was played. This therefore makes using this guitar almost impossible, buyer beware.
The Guitar does not recognise the notes played correctly and even in easy or training mode it is very hard to strike a correct note. My kids who wanted to play guitar battles are very disapointed. avoid this product. unfortunately there does not seem to be any other way to buy a spare guitar. shame.
Amazon got this to me smack on time after a lengthy pre-order. As soon as it arrived it was used for about 2 hours before the strum button stopped working properly in the down sense. About 1/3 of the time it played double notes. I returned it to Amazon for a refund which they promptly delivered. Thank you Amazon, but no thank you Njoy!