DVMwatch2k

Even DVMwatch2k looks like a regular watch, it has hidden camera and you can record video, audio or take photograph by it.
It can start recording by motion detection.
It is simple-use, one touch operation.
It records 2K High Definition Videos, you can adjust its resolution. (Please see its sample at the end of the post)
Its design is fashionable and sleek.
Its battery life is 60 minutes and battery capacity is 380 mAH.