Screw the joint part of Camera Belt Button on camera.
Fix the stand of the Camera Belt Button with your Waist belt.
While using, insert the joint part of Camera Belt Button into the stand of Camera Belt Button, then you can hang up the camera on your waist belt.
When you want to take the Camera away from the stand of Camera Belt Button, just press the camera to release joint part from stand, then up the camera to take the joint part out from the stand.