Comparison Defender Oscar SM-660L Pro vs Logitech Corded Keyboard K280e

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.

— Game. Keyboards designed for use in computer games. Outwardly, they are distinguished by a characteristic design, often quite original and aggressive; some key keys, such as WASD, may be highlighted in colour. In addition, the design may provide various special equipment — additional programmable keys, headphone and microphone jacks, a screen with the ability to display in-game chat, etc. Some of these models are created for specific popular games. Keypads are a separate type of gaming keyboards (see "Format").

— Ergonomic. Ergonomic keyboards are distinguished by a specific layout aimed at making long-term work on them as comfortable as possible. The keys of such keyboards may not be located straight, but in an arc, have a rhombic shape, the alphabetic part of the keyboard itself can be divided into two parts located at an angle to each other, etc. Such design solutions provide a more natural position of the hands during work, which helps to reduce fatigue.

— For tablets. Keyboards specially designed for use with Tablet PCs. They can have special mounts and act as a docking station — with such a keyboard, the tablet practically turns into a netbook, up to the ability to fold the entire structure in the manner of a regular laptop (for ease of transportation and protection of the display from damage). Some models are ini...tially optimized for certain tablets. Because the size of modern tablets rarely exceeds 10", then the keyboards for them are made compact (see "Format").

— Keyboard case. Models that combine the functions of a protective case and a keyboard for entering texts or commands in one bottle. As a rule, keyboard cases are produced for certain tablet models, thereby expanding the functionality of tablet computers. When closed, such accessories tightly fit the tablet body and protect it from damage during transportation. According to the connection methods, keyboard cases can use a Bluetooth connection, proprietary connectors or USB.

— For TV. Keyboards designed for use with Smart TVs. These TVs can connect to the Internet and use various network services, and many of them allow you to install additional applications. Both may require a full keyboard — for example, with its help it is convenient to enter text in Skype, search for content by name, or play some games. Common features of "TV" keyboards are, firstly, a compact format (see below), secondly, wireless connection (in most cases; see "Type of connection"), thirdly, the presence of additional buttons and other controls to operate individual TV functions. When choosing such a model, it is worth clarifying its compatibility with a particular TV.

— Flexible. Keyboards made of elastic materials and having a flexible body — most often in the form of a rubber "mat" with protrusion keys. Such models are extremely easy to transport: a flexible design makes it easy to squeeze the keyboard between other things, bend it, or even roll it up. Another advantage is that the “board” can be easily made moisture resistant (although this is not necessary in this case). At the same time, in terms of the “response” of the keys, a flexible keyboard can differ markedly from more traditional ones, and it may take some getting used to working on it. And in terms of format (see below), such models are most often compact.

The number of additional keys provided in the design of the keyboard.

Such keys do not belong to the standard layout and are intended for quick access to specific functions or individual applications — for example, to control the media player or open mail with one click. This function is convenient because commands from additional keys are usually recognized by the system regardless of what is on the screen — thanks to this, for example, you do not have to close the text editor to switch tracks in the player.

Note that in this case we are talking about individual keys that have a strictly defined purpose and corresponding markings. Programmable buttons, the Fn key (see below) and the functions of the main keys implemented through Fn are not taken into account in this paragraph.

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 presence in the keyboard of a special game mode.

This function is found exclusively in models of the corresponding specialization (see "Intended use"). Enabling Game Mode disables some of the keys and keyboard shortcuts used by the system, such as the Windows Start menu button and the context menu button. Thanks to this, you do not have to worry that an accidental key press will call a system function and interrupt the game.

In many models, you can customize a specific set of keys that are deactivated in the game mode.

The colour of the backlight provided in the design of the keyboard.

In general, the backlight performs two functions: practical (makes the keys more visible in low light) and aesthetic (gives the keyboard a beautiful appearance). However, it cannot be said that non-backlit keyboards will be unusable in the dark, the light from the monitor will still illuminate the buttons. The simplest version of the backlight is one-colour. In this case, specific colours can be different: for example, white is well suited for general-purpose keyboards (work or home), but other shades can be found in gaming or design models, for example, red, green, blue, purple or orange. If two or three colours are indicated for the keyboard, this may mean either the ability to switch between these colours, or that this model comes in several versions that differ in the shade of the backlight; these nuances should be clarified separately.

The most advanced options are multi-colour and RGB backlighting. Multi-colour systems are called systems in which more than three colour options are provided, sometimes with intermediate shades. And RGB-backlight all...ows you to choose almost any shade at the request of the user; in addition, the possibility of synchronization (see "Illumination with effects") is found mainly in such systems, although single-colour keyboards can also be equipped with other effects.

Protecting the keyboard from spilling liquid on it. Most waterproof keyboards do not have a full-fledged sealed case and are designed to remain operational in the event of accidental contact with a relatively small amount of liquid (up to 200 mL) — for example, in the classic case of spilling coffee on the keyboard.