NerveGear is a fictional VR headset that first appeared in the light novel and anime series Sword Art Online. This headset is able to fully immerse the user in a virtual reality world, allowing them to experience all five senses as if they were in the game.
The NerveGear technology is based on the concept of a “FullDive” system, which uses a combination of brainwave analysis and nerve stimulation to create a seamless virtual reality experience.
By reading the user’s brainwaves, the system is able to determine their movements and intentions, and then stimulate the corresponding nerves to create the sensation of touch, taste, and other physical sensations.

One of the most unique features of the NerveGear is its ability to completely cut off the user from the outside world. When the headset is activated, it generates a field around the user’s head that blocks all external signals, effectively “trapping” them in the virtual world.
This allows for an unparalleled level of immersion, but also makes it extremely dangerous, as it prevents the user from communicating with the outside world, and disconnecting from the device without the proper procedures can cause serious harm or even death.
Despite its dangerous nature, the NerveGear and technology behind it have captured the imagination of many, and has inspired a number of real-world VR headsets, with the closest as of now being “brain-computer interface” technology that still under development.
NerveGear serves as a cautionary tale about the potential dangers of fully immersing ourselves in virtual reality, and serves as a reminder to always use technology responsibly and ethically. You can check out this link for VR headsets and make your choice according to your budget.