I saw your other thread. That isn't a genuine Chromecast so we can't support further I'm afraid. The middle of that photo uses a letter 'C' instead of a letter 'G' like a genuine product.
It looks like you've posted your concern twice and we have responded to your other thread. I'll merge this one on your other thread — if you still have any questions and concerns, please continue the conversation there as this thread will be locked automatically once merged successfully.
By the way, thanks for the help here, davidking.