SmallRig Cage for DJI Osmo Action 3 4119 is a full cage specially designed for DJI Osmo Action 3 / Action 4. With a form-fitting design, it easily secures / releases camera via a press lock and gives full access to buttons and applying screen proctor. The left side allows attaching DJI Mic and magnetic mounts on the bottom and right side support the original magnetic quick-release adapter or Adapter Mount 3662 for quick switch between horizontal and vertical modes. You can replace battery from the right side without removing the cage.