What's inside the box?

Sometime ago, a huge box arrived at my place and I kept wondering if it is completely filled with goodies. I had to tear everything apart and whoa! What was inside?

THE BLACK BOX!

Can you guess what was inside? Nopes, greedy me, even if you did make the correct guess, I wouldn't give it away to you! LOL!
You can keep making guesses until in my next post, I reveal what's inside.