Comparison Logitech Keyboard K120 vs Logitech Desktop MK120

In addition to pure keyboards, there are keyboard + mouse sets on the modern market. Usually, these are wireless devices with a radio channel connection (see "Connection type"), but there are also wired sets. Anyway, buying a set may be more convenient than buying each item separately: for example, when connected via radio, the keyboard and mouse from one set will use one adapter to work. On the other hand, a complete mouse may not be suitable, and sometimes it's easier to choose a "rodent" separately.

The length of the cable that the keyboard is equipped with for wired connection (see "Connection type").

When choosing this parameter, you should first of all take into account the distance from the device to the connection port: a cable that is too short may simply not reach the connector, and a cable that is too long may get confused at hand and create inconvenience. As for specific values, the reference length is 1.8 m. However, there are cables both shorter and longer.

The colour of the Cyrillic letters printed on the keyboard.

This colour is usually chosen so that the letters are clearly visible. This point does not affect the functionality of the keyboard, and the choice in this case depends mainly on personal preferences. However, there is also a practical point: for inexperienced users who have not mastered touch typing, it is desirable that the letters stand out as much as possible against the background of the keys.

Transparent letters are a separate case — they are used in keyboards equipped with a backlight (see below), due to which such characters, when the backlight is on, are visible even in the dark.

The principle of operation of the mouse supplied with the keyboard.

— Optical. The principle of operation of optical mice is to use an LED that illuminates the surface under the mouse, and a photo sensor that “observes” the illuminated surface and tracks movements. This technology is quite reliable and inexpensive; at the same time, traditional optical mice, although they are inferior to laser and BlueTrack mice in terms of accuracy, however, they work more than satisfactorily on standard surfaces (rodent pad, tabletop). In addition, various specific technologies can be used in the design to increase accuracy and allow working on unusual surfaces.

— Laser. The development of the idea of the optical mice described above: the principle of operation is the same, however, for illumination, in accordance with the name, a more intense light source is used — a laser. Thanks to this, laser mice are more accurate and behave better in non-standard conditions — on fleecy, polished surfaces, etc. — however, they are more expensive.

— BlueTrack. Microsoft proprietary technology (however, used by other manufacturers), which provides a number of improvements for optical mice (see above): a bright blue LED (hence the name), high-quality coated lenses, a large sensor, etc. Thanks to this, such mice are significantly superior to conventional optical mice both in accuracy and in the variety of surfaces with which they are co...mpatible. The disadvantage of this traditional option is the high cost.

The number of buttons in the design of the mouse, which is included in the kit. The minimum number of such buttons to work in most modern operating systems is two, and a larger number, usually, means that the mouse has additional functions. For example, the third key can be used to change the resolution of the mouse sensor on the fly, for the function of double or triple click (the latter is used in games for shooting in short bursts); a pair of buttons on the side under the thumb is usually configured for the "back" and "forward" functions in the browser, etc. And in gaming mice, there can be more than a dozen additional buttons for the fastest access to various game functions.

The number of scroll wheels provided in the design of the complete mouse. The most traditional option is considered to be one wheel that provides movement up and down (and in some mice — in all directions), but sometimes it can be supplemented with a second one — for horizontal scrolling. The latter is useful when working with large-format materials — for example, in the field of design or printing.

Resolution of the optical sensor used in the bundled mouse. Like a camera matrix, such a sensor consists of many individual photosensitive points; this parameter indicates how many sensor points are for each inch of the surface on which the mouse moves.

Although high DPI values \u200b\u200bare often considered an indicator of good mouse accuracy, in fact this moment only affects the speed of moving the cursor around the screen (and not the actual one, but the maximum possible one — the “working” DPI value in the settings is often reduced, otherwise using the mouse would be inconvenient ). Therefore, high sensor resolutions are important mainly for working on large monitors, and even in such cases, indicators of 1000 – 3000 DPI are considered quite sufficient, higher values \u200b\u200bare more of a publicity stunt than a really justified necessity.