This document introduces a new simulation helmet technology called "4D" that allows users to be fully immersed in 3D movies and games in their own home. The helmet uses WiFi to sync with a TV or game console, providing an all-encompassing 3D experience without the need to go to a movie theater. The technology aims to make users feel like they are part of the on-screen action. It has advantages over other 3D formats by placing the viewer inside the entire 3D world, rather than just viewing 3D effects on a flat screen.