About the props used in detective movies, such as Mr. Xu Guanwen's "Half a Category"

First of all, most of the props in detective movies will not appear in reality, at least not with today's technology, just like the props in 007.

However, I don’t remember which 007 film included a mini camera. It was impossible to achieve at the time, but today, it has been released.

And the one you are talking about is not in the shape of a long strip, it is just a mini camera placed in the belt