Hat Camera

Hat that records video clip @30fps

Screenshots

Hunter's comment

Foxspy introduces the Hat with Camera in it. So you can record while you are in the sports ground or having fun with your friends at picnic/party. You can manage it with one-button operation.

And also while you are on the road and lost your wallet, so you can spy by checking the recorded video.
It has 4GB internal storage means it can record approx 160 minutes of clips.

Link

https://www.foxspyoutlet.com/hidden-cameras/hat-camera/