Oculus Quest 2 — Advanced All-In-One Virtual Reality Headset — 64 GB (refurbished)

2 (two) is a number, numeral and digit. It is the natural number following 1 and preceding 3. It is the smallest and the only even prime number.

Because it forms the basis of a duality, it has religious and spiritual significance in many cultures.

Headset may refer to:

• Headset (audio), audio headphone(s), particularly with an attached microphone
• Head Set (band), an American alternative rock band
• Headset (bicycle part), a bicycle part that connects the fork to the frame
• Head-mounted display, a video display mounted on a head strap or helmet
• Headset, an electronica / hip-hop group of Dntel
• VR headset, a set that all-in-one includes the audio headphones, the microphone and a virtual-reality device

Oculus (a term from Latin oculus, meaning 'eye'), may refer to the following:

A quest is a journey toward a specific mission or a goal. It serves as a plot device in mythology and fiction: a difficult journey towards a goal, often symbolic or allegorical. Tales of quests figure prominently in the folklore of every nation and ethnic culture. In literature, the object of a quest requires great exertion on the part of the hero, who must overcome many obstacles, typically including much travel. The aspect of travel allows the storyteller to showcase exotic locations and cultures (an objective of the narrative, not of the character). The object of a quest may also have supernatural properties, often leading the protagonist into other worlds and dimensions. The moral of a quest tale often centers on the changed character of the hero.

Reality is a concept that varies with context and culture. Reality may be viewed as the sum or aggregate of all objects in existence within the universe, as opposed to that which is only imaginary, nonexistent or nonactual. The term is also used to refer to the ontological status of things, indicating their existence. In physical terms, reality is the totality of a system, known and unknown.

Philosophical questions about the nature of reality or existence or being are considered under the rubric of ontology, which is a major branch of metaphysics in the Western philosophical tradition. Ontological questions also feature in diverse branches of philosophy, including the philosophy of science, of religion, of mathematics, and philosophical logic. These include questions about whether only physical objects are real (i.e., physicalism), whether reality is fundamentally immaterial (e.g. idealism), whether hypothetical unobservable entities posited by scientific theories exist, whether a god or gods exist, whether numbers and other abstract objects exist, and whether possible worlds exist. Epistemology is concerned with what can be known or inferred as likely and how, whereby in the modern world emphasis is put on reason, empirical evidence and science as sources and methods to determine or investigate reality.

Virtual may refer to:

• Virtual (horse), a thoroughbred racehorse
• Virtual channel, a channel designation which differs from that of the actual radio channel (or range of frequencies) on which the signal travels
• Virtual function, a programming function or method whose behaviour can be overridden within an inheriting class by a function with the same signature
• Virtual machine, the virtualization of a computer system
• Virtual meeting, or web conferencing
• Virtual memory, a memory management technique that abstracts the memory address space in a computer
• Virtual particle, a type of short-lived particle of indeterminate mass
• Virtual reality (virtuality), computer programs with an interface that gives the user the impression that they are physically inside a simulated space
• Virtual world, a computer-based simulated environment populated by many users who can create a personal avatar, and simultaneously and independently explore the world, participate in its activities and communicate with others
• Virtual, a 2001 album by Romanian band Animal X
• Virtual, a former Blizzard Entertainment online streamer known for interviewing Ng Wai Chung during the Blitzchung Controversy
• Exit pupil, a virtual aperture in an optical system