A4tech 2.4G V-Track 7100N

This small device allows wireless peripherals such as keyboards and mice to communicate with the computer. It is usually plugged into the computer's USB port and acts as a bridge between the computer and the wireless device.

Membrane keyboards work on the principle of a flexible membrane that is located under the keys. When the user presses a key, the membrane touches the bottom perimeter, registering the keystroke. This type of keyboard is usually quiet in use, so it is suitable for office environments. Due to their design, membrane keyboards are also more resistant to dust and spills. The membrane underneath the keys provides a degree of protection against the ingress of foreign particles and liquids, which can help prevent damage.

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.

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.