I thought I posted a reply to this, so if I get two, sorry.It is rail mounted and a 500 lumen light is part of the set-up. One is also available with a laser sight.
They say it comes on automatically when the gun is drawn from the holster, I would hope that means only the camera and not necessarily the light or the laser.
The gizmo looks like the "Fact Duty" being offered by Viridian.
https://gun-camera.com/
I have their light that uses ECR tech to return the gizmo to the state it was in when you holstered your piece, Off, ON or Strobe.
This site is offering a "TRY FOR FREE" button to LEOs.
Don't think it's being offered to the public yet, but once it is, it will give "first person shooter" a new angle.