Glossary

The words the spec sheet uses

32 terms, defined the way we wish spec sheets defined them — by what they physically do to your aim, your back, or your eyes.

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A

Actuation point: How far a key must travel before the switch registers. Analog and Hall effect keyboards let you set it anywhere from about 0.1 to 4 mm.
Adaptive sync (VRR): Umbrella term for G-Sync and FreeSync: the monitor refreshes in step with the GPU's frame delivery instead of a fixed clock, removing tearing and stutter.
Analog switch: A keyboard switch that reports travel distance as a continuous value instead of a binary press, enabling variable inputs and rapid trigger.
Arm's length rule: Monitor distance rule of thumb: the screen should sit about an arm's length away, roughly 60–80 cm for a 27" display.

Bluetooth audio latency: Standard Bluetooth audio adds 100–200 ms, which is catastrophic for gaming. Wireless gaming headsets use 2.4 GHz dongles for a reason.
Bias lighting: A soft light behind a monitor that raises ambient luminance, reducing eye strain in dark rooms and improving perceived contrast.

Clamping force: How hard a headset's earcups press against your head. Too little and the seal breaks; too much and glasses wearers suffer within an hour.
Cold-cure foam: Molded foam cured in a closed mold, giving consistent density that keeps its shape for years. The mark of a premium chair; cheap chairs use cut foam scraps.
Control pad: A mousepad surface tuned for friction and stopping power. Favors precise tracking in tactical shooters over fast flicks.

DPI / CPI: Counts per inch the sensor reports. Modern sensors are accurate well past 1600; most pro players use 400–1600 and scale in-game sensitivity.
Debounce delay: A short wait a keyboard applies to ignore switch contact bounce. Hall effect switches have none, which is part of why they feel faster.

FreeSync: AMD's adaptive-sync implementation, built on the VESA Adaptive-Sync standard. Certification tiers vary; check whether a monitor is 'FreeSync Premium' or plain.

G-Sync: NVIDIA's adaptive-sync implementation. G-Sync Compatible monitors use the VESA standard; 'G-Sync' proper adds a hardware module and validation.

Hall effect sensor: A switch that detects key position magnetically, with no metal contact to wear out. Enables adjustable actuation and rapid trigger without debounce delay.
Hot-swap: A keyboard PCB with sockets so switches can be replaced without soldering. Convenient, but socket quality varies widely.

Lumbar support (adaptive): Lumbar systems that respond to pressure and posture rather than a fixed curve. Marketing term; verify the actual mechanism.

Motion clarity: How legible a moving image is on a monitor, driven mostly by pixel response time and refresh rate together — not by refresh rate alone.

OLED (QD-OLED, WOLED): Self-emissive panels with near-instant pixel response and per-pixel contrast. Text fringing and burn-in mitigation are the trade-offs to understand.
Open-back: Headphone cups that vent sound outward, giving a wider, more natural soundstage at the cost of zero sound isolation. Poor choice for noisy rooms.

Palm grip: Mouse grip with the whole palm in contact and fingers lying flat. Favors larger, flatter shells and lower DPI sensitivity.
Polling rate: How often a mouse or keyboard reports its state to the PC, in Hz. 1000 Hz has been standard for years; 4000–8000 Hz claims benefits that are real but small.

Rapid trigger: A Hall effect/analog keyboard feature that resets and re-actuates a key the instant it moves, instead of waiting to pass a fixed point. The main reason esports players switch.
Refresh rate: How many times per second a monitor redraws, in Hz. 144 Hz is the current entry floor for gaming; 240–400 Hz benefits competitive players most.
Response time (GtG): Time for a pixel to change gray-to-gray. Marketing figures are measured in unregulated ways; motion tests tell the truth.

Seat depth: Front-to-back length of the seat pan. The single most ignored chair spec: too deep and your legs go numb, too shallow and your thighs load unevenly.
Seat pan: The part of the chair you sit on. Width, depth, and front edge 'waterfall' decide long-session comfort more than backrest marketing.
Speed pad: A mousepad surface tuned for low friction and fast glide. Favors flick-heavy play; costs some stopping precision.
Strobe / backlight flicker (PWM): Rapid on-off modulation some monitors use to control brightness. Can cause eye strain for sensitive users; look for flicker-free certification.

TKL (tenkeyless): A keyboard without the numpad, freeing desk space for a lower mouse sensitivity. The most common esports layout.
Tilt-lock: A chair mechanism that locks the backrest at fixed recline angles instead of free-floating. Rocking versus locked is a real preference split.

Weight limit (chair): The manufacturer's rated maximum user weight. Distrust untested round numbers; warranty terms matter more than the figure itself.
Wireless latency (2.4GHz): Delay added by a dedicated wireless dongle. Good modern implementations add 1 ms or less — genuinely indistinguishable from wired.