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Wired connections include all connection methods that require physical contact between the device and the computer using a cable. This is most often done with the classic USB-A connector, but less commonly with the USB-C variant. Although this form of connection usually offers a faster and more reliable connection, it can restrict freedom of movement and contribute to desk clutter, especially due to the length of the cable, which is often around 1.8 metres.

USB (Universal Serial Bus) is a standard interface for connecting various peripheral devices to computers. It is known for its versatility, speed and ability to transfer both data and electricity.

Anti-ghosting is a feature of keyboards that allows multiple simultaneous keystrokes to be recorded flawlessly. This feature is essential for gamers and professional users who require fast and accurate inputs, for example for using complex keyboard shortcuts. "Ghosting" occurs when multiple keys are pressed simultaneously and the keyboard is unable to correctly record each press, which can lead to incorrect or unrecorded input. Anti-ghosting keyboards are designed to prevent this problem. They use advanced circuit designs or individual diodes for each key, this ensures that every keystroke is correctly and reliably registered no matter how many keys are pressed simultaneously.

Optical mice use LED light and a sensor to detect motion on the surface. They are popular for their reliability and high accuracy in common applications. They work well on surfaces where light reflects well, meaning if you have a shiny or rough surface, it's better to use a mouse pad. Compared to laser mice, they can have a lower DPI resolution.

DPI (dots per inch) is an indicator that measures the sensitivity of the mouse. A higher DPI value means the mouse responds to smaller movements, while a lower value means the opposite. Mice with variable DPI allow users to adjust the sensitivity to their specific needs, whether it's for detailed graphics work or playing shooter games.

The flywheel mouse has a wheel that can continue to rotate when released, allowing for fast and smooth scrolling. It is ideal for viewing long documents or web pages.

In addition to traditional vertical scrolling, the side-tilt mouse allows horizontal scrolling by tilting the scroll wheel to the left or right. Useful for working with spreadsheets or widescreen documents.

Hyperscroll allows users to scroll long documents or web pages quickly and smoothly. The hyperscroll mouse wheel can rotate at high speed, making it ideal for scrolling through large volumes of data.

This feature allows users to save different settings for different tasks or games, such as different DPI sensitivities or button programming, and easily switch between them.

PTFE, often known as Teflon, is used on the gliders of some mice. These gliders provide a smooth and quiet mouse glide over most surfaces. PTFE is also wear-resistant, which extends the life of the gliders and improves the overall experience of using the mouse.

Closed-back headphones are those headphones that have the shells fully closed, which provides sound isolation and reduces the amount of sound that can escape from the headphones. Sealed headphones also reduce the amount of ambient noise that can penetrate the headphones, making them ideal for listening in noisy environments.

Radio Frequency (RF) is a type of wireless headphone connection that uses radio waves to transmit sound between the source and the headphones. RF headphones typically provide greater range than Bluetooth headphones, often up to 100 metres. However, they can be susceptible to interference from other devices that use the same radio frequency.

Directional sensing, sometimes referred to as cardioid sensing, is a type of directional characteristic where the microphone preferentially senses sounds coming from one direction (usually the front) and suppresses sounds coming from other directions. This is useful, for example, in noisy environments or when you want to capture the sound of a particular source.

Noise cancellation is a feature that reduces or eliminates unwanted background or ambient sounds. This can improve the sound quality when listening to music or talking. There are two main types of noise cancellation: passive and active. Passive noise cancellation uses physical barriers, such as the tight fit of the headphones on the ears, to block out ambient sound. Active Noise Cancellation (ANC) uses electronics to create sound that "cancels out" unwanted sounds.