Virtual reality has been around for many years now, first originating as panoramic paintings that encompassed viewer’s vision and made them feel as though they were there in the action. Later progressing into stereoscopic viewers with no motion tracking, but establishing the same effect. Now VR has evolved into a completely new technology, the term itself wasn’t coined until 1987.

Today’s simple definition of virtual reality is “an artificial world that consists of images and sounds created by a computer and that is affected by the actions of a person who is experiencing it”.

But how does it work?

The headsets contain LCD displays or lenses that adjust the image for each eye creating a 3D image, because each one of your eyes sees the world differently. The full immersion factor comes into play with a wide enough field of view that allows users to navigate through the image or video with the turn of their head. Hand controls and buttons on the side of the headsets allow users to feel immersed in content as well.

VR has a wide range of capabilities because of its all-encompassing experience that includes: boosting morale in hospitals, training medical school students and selling houses.

But with so many options in headsets to choose from this year, you should know more details.

Let’s examine the four most popular headsets of this year.

Oculus Rift

• Requires a high-end PC.
• OLED display with 2160 X 1200 pixels.
• Includes: headset, sensor, remote, cables, Xbox One controller, and two games        (EVE:Valkyrie, and Lucky’s Tale).
• $599.

Samsung Gear VR

• Requires Samsung devices (Note5, S6 edge+, S6, S6 edge).
• $99.99.
• VR app store.

HTC Vive

• Requires high-end PC.
• Contains camera that allows you to see a real-world view as well.
• $800
• OLED display with 2160×1200 pixels.
• Includes: headset, two wireless controllers, two base stations, link box, earbuds, Vive accessories, safety guide and warranty card.
• Self-facing camera that tracks user movement.

Sony PlayStation VR

• Requires PS4 gaming console.
• PlayStation 4 can be easily rendered for play at 120 hz.
•  OLED display.
• Pixels at 1920 x 1080.
• $400
• Tentatively set to be released in October of this year.

Regardless of the model you choose, know that virtual reality is here to stay.