NOTE: This is the mount designed for the Full Size GoPro Case mount to make sure please measure how wide your case is. The matching case should be approx: 73mms or 2 7/8in wide.The mount functions like a mount and a replacement backdoor for your GoPro case. Simply snap off the backdoor on current case. Then insert the case into the recess in the mount. lean it back and lock down the top arm like you would on a typical case. The mount is now assembled and it takes seconds to reverse the process or access the camera. When buying this mount please know that you will need to supply a sticky Velcro strip to attach to the sloped part of the mount. This will in turn adhere on to the corresponding Velcro strip commonly found on "tactical" hats. Please view the video for proper instructions and demonstration. With the mount in place you can now lose that head strap and always have your camera point in the same place and reduce all unnecessary movement.