The VR content will provide videos with two perspectives in some form. Through the , two eyes see videos of the same thing respectively from two perspectives,forming a stereoscopic image. Usually the 3D we see in cinemas form different perspectives by filtering light, and the VR content usually provided on mobile phones divides binocular vision through physical means, which is the same reason. On this basis, there is also a vr all-in-one machine.The content is provided in different forms, and the auxiliary tools are also different. With smartphones, various apps provide a range of content, games, , panoramas, etc., so this is a tool to experience more VR at a lower cost, and it is very cost-effective. How to use 1. You need to have a smartphone, and then download the app that provides VR content. You need to find the most suitable app .Search "vr" or "3D Glasses" or "" in the or Andriod Market to Apps. or any app you know provides VR content through other channels, For example Download 3D Videos (left-right format) into your phone, directly,that would be fine. 2. The size of the smartphone should match the size of the . A phone that is too may not fit into the , and a phone that is too small may cause light leakage around the video screen and affect the experience.And the higher the resolution of the smartphone screen, the better the vision and the more delicate the visual effect. 3. Start to use the , please adjust the position of the lenses, the initial experience is not very good, the eyes are not so easily deceived, relax, after a few minutes of adaptation, you will have a great VR experience. Colour:black Material:plastic Package Contents: 1 x G04E 3D Headset(Without handle) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.