Redragon Adria

The Redragon Devarajas K556 RGB Mechanical Keyboard Review: Jack Of Most Trades

Written by E. Fylladitakis

Written by E. Fylladitakis

This post is taken from AnandTech

The market of mechanical keyboards has been on the rise for nearly a decade, with an ever-growing number of products and the sales volumes to match. The high margins triggered the diversification of many known companies to include mechanical keyboards into their products portfolio, as well as the founding of many new companies, be it either as daughter companies of established manufacturers or as entirely new startups. Most of these new companies failed to reach a global presence, mainly due to the lack of resources and production capabilities.

Established manufacturers, however, took advantage of the growing market and diversified outside of their region’s borders. One of these companies was Redragon, a Chinese manufacturer of PC gaming peripherals. Although the brand was unknown outside of Asia until recently, Redragon has been around since 1996. They also are one of the largest gaming peripherals manufacturers on the planet, with over 1.000 employees.

In today’s review, we are taking a close look at one of Redragon’s most popular mechanical keyboards: the Devarajas K556 RGB gaming keyboard. Designed by the company to be a jack-of-all-trades gaming keyboard, the K556 boasts top performance, full programmability, RGB lighting, and a very competitive retail price. With its name roughly translating as “god king”, we definitely hope that the product will live up to it.

Packaging and Bundle

We received the Devarajas K556 RGB in a relatively sturdy cardboard box with a carrying handle. The artwork on the box is based on a colorful rendering of the keyboard itself. Inside the box, the keyboard is protected only by a nylon bag, with the walls of the box being virtually the only layer of shipping protection.

Inside the box, we found a user’s manual, a vinyl sticker, a plastic keycap puller, and a metallic switch puller. One can, in theory, replace the switches of the keyboard without dismantling it, either for mixing-&-matching different switches or for replacing a bad switch.

The Redragon Devarajas K556 RGB Mechanical Keyboard

The core design of the Devarajas K556 is similar to that of many other minimalistic mechanical keyboards, with the exception of Redragon adding a few features to aesthetically enhance the keyboard. It has a metallic top and side plates, with chamfered and polished edges, and a plastic bottom frame. The top plate acts as a support for the mechanical switches, with the keys “floating” over it. Redragon’s logo can be seen on a metallic badge right above the arrow keys.

We received the US layout version of the Devarajas K556 RGB. The company fully adhered to the 104 key ANSI layout, with the sole overall deviation being the replacement of the right OS key with an Fn key that allows for additional keystroke functions. Most are simple multimedia functions, but there is a rudimentary macro recording feature available, allowing for the on-the-fly programming of basic keystroke macros. It has a 6.25× Spacebar and seven 1.25× bottom row keys.


Redragon is using a futuristic font on the keycaps, which have both the primary and the secondary characters printed towards their top edge. They also painted the sides of the keycaps glossy black, making them partially reflective.


The bottom side is very simple and plain. There are two large anti-skid pads near the bottom of the keyboard and two smaller pads surrounding the tilt adjustment feet surround. The feet are small considering the weight of the keyboard and will easily fold if the keyboard is forced backwards. Moreover, when the keyboard’s feet are open, the front anti-skid pads barely make any contact with the surface, meaning that the front metal part of the keyboard is what actually touches the desk – which is not healthy for desks made of softer materials, such as real wood. A sticker with the keyboard’s basic data and serial number is present at the center.

Beneath the keycaps of the Devarajas K556 RGB, we find Redragon’s dust-proof Brown switches, which are made by OUTEMU. OUTEMU is a Chinese manufacturer that effectively copies Cherry’s products, meaning that the OUTEMU brown switches are an almost direct copy of Cherry’s tactile MX Brown switch. OUTEMU is also using clear plastic for the switch housing, much like what Cherry does with their RGB switch variants. Redragon also copies Cherry’s cross-type supports for the larger keys, even though most keyboards that come with OUTEMU switches stick with the classic bar supports.

The RGB lighting of the Devarajas K556 RGB is crisp and well applied. The basic colors are bright and clear, with minimal backlight bleeding around the keys. Redragon’s glossy keycaps, however, reflect some of the LED lights and it is not a pleasant visual effect, especially when seen from side angles and not from the user’s point of view.

After taking the keyboard apart, we are left with a green PCB and its metal support plate. The assembly job is clean and we can see Redragon applying clear lacquer over the vital parts of the assembly, probably to enhance their resilience against moisture and acids.

The heart of the Devarajas K556 RGB keyboard is branded as an eVision VS11K09A-1 – which, however, actually is a keyboard model number from another Chinese OEM. The actual manufacturer of the MCU is Sonix and the MCU itself probably is the SN32F248B. This MCU is very popular amongst Asian designers and manufacturers. It features a 48 MHz 32-bit ARM Cortex-M0 CPU, 8KB of RAM, and 64KB of Flash ROM, which generally tend to be enough for a gaming keyboard.


The Redragon Devarajas K556 is a fully programmable mechanical keyboard, which is exciting for a keyboard at this price range – until one finally gets to trying out the software. The software is a mere 4 MB download from the manufacturer’s website and is so basic that does not even have a name – it is just “keyboard software”. Nevertheless, it does allow for the selection of the lighting effects and the per-key programming of the keyboard and it can store up to three layout profiles. Everything is packed into a single screen, from the left side of which the user can choose one of the 20 lighting effects, adjust its direction, brightness, and speed.


The software offers per-key programmability but is very basic. The only options are the remapping of a key to another key or multimedia command or the use of a programmed macro. The macro recorder only records keyboard keystrokes, with the sole advanced option being to include the actual delays or not. We find it extremely unlikely that any advanced gamer or professional would be able to make practical use of the software – it is so basic that it may be useful to only a handful of users, under specific usage scenarios.


Per-Key Quality Testing

In order to test the quality and consistency of a keyboard, we are using a texture analyser that is programmed to measure and display the actuation force of the standard keyboard keys. By measuring the actuation force of every key, the quality and consistency of the keyboard can be quantified. It can also reveal design issues, such as the larger keys being far softer to press than the main keys of the keyboard. The actuation force is measured in Centinewton (cN). Some companies use another figure, gram-force (gf). The conversion formula is 1 cN = 1.02 gf (i.e. they are about the same). A high-quality keyboard should be as consistent as possible, with an average actuation force as near to the manufacturer’s specs as possible and a disparity of less than ±10%. Greater differences are likely to be perceptible by users. It is worth noting that there is typically variance among keyboards, although most keyboard companies will try and maintain consistency – as with other reviews, we’re testing our sample only.

The machine we use for our testing is accurate enough to provide readings with a resolution of 0.1 cN. For wider keys (e.g. Enter, Space Bar, etc.), the measurement is taking place at the center of the key, right above the switch. Note that large keys generally have a lower actuation force even if the actuation point is at the dead center of the key. This is natural, as the size and weight of the keycap reduce the required actuation force. For this reason, we do display the force required to actuate every key but we only use the results of the typically sized keys for our consistency calculations. Still, very low figures on medium sized keys, such as the Shift and Enter keys reveal design issues and can easily be perceptible by the user.

The results that we received from the testing of the Redragon Devarajas K556 are rather mediocre but consistent with those of keyboards using OUTEMU switches that we reviewed in the past. The disparity across the main keys of the keyboard is significant and users with exceptional tactile senses will actually discern the difference between certain keys. The average actuation force is 41.3 cN, which is low, significantly lower than what we would expect from a Brown switch clone. It may feel too light to people who are used to using a keyboard using other kinds of similar tactile switches but one cannot know the difference if that is the first mechanical keyboard they are using. The low actuation force may have the positive side of reducing long term fatigue if one’s fingers are trained enough not to bottom down every keystroke.

Hands-on Testing

I always try to use every keyboard that we review as my personal keyboard for at least a week. My typical weekly usage includes a lot of typing (about 100-150 pages), a few hours of gaming and some casual usage, such as internet browsing and messaging. I personally prefer Cherry MX Brown or similar (tactile) switches for such tasks but the audible tactile Blue switches are also close to my personal preference. As such, the OUTEMU brown switches of the Redragon Devarajas K556 RGB should have been almost perfect for my needs. Aside from a short learning curve, as my fingers were not used to the light force required by these switches and were bottoming down most keystrokes, the Redragon Devarajas K556 RGB indeed was nearly perfect for my professional needs. It was comfortable for long-term use and the keystroke feedback was light but adequate. The only thing that I missed was advanced programmable macros that I sometimes use, which were impossible to program with the rudimentary software this keyboard comes with.

When it comes to gaming, the Redragon Devarajas K556 actually has very few features that would actually assist a gamer. The macro recorder is elementary, and the vast majority of users will not be able to make practical use of it, reducing the list of gaming-related practical features to the RGB lighting profiles. As such, the keyboard does work fine and is comfortable for long-term gaming but does not really offer any gaming edge over any other similar mechanical keyboard.


Redragon markets the Devarajas K556 RGB as an advanced mechanical keyboard with RGB backlighting. For its retail price, which usually is around $50, it does seem like quite the catch. The company is, however, very careful with the marketing quotes, which seem to be focused on the metallic top plate of the keyboard, the removable switches, and its RGB backlighting, barely revealing that it can utilize macros and entirely skipping the mention of any programming capabilities. With the extremely basic software and the programmability of the keyboard being rudimentary at best, it is apparent that Redragon does not want to put attention on something that will backfire.

In terms of quality, Redragon did a quite good job considering the price range of the Devarajas K556 RGB. It is a well-made keyboard, with a solid frame and it is carefully assembled. Users who want a keyboard with a minimal desk footprint and/or a keyboard that they can easily clean will certainly appreciate its design. The keycaps are double-shot and are not better nor worse than those of most keyboards around this price range.

Our only long-term reliability concern is the application of the mechanical switches and, by that, we do not mean that OUTEMU’s switches are unreliable. Sure, these switches are certainly not as good as original Cherry MX products and that was proven during our testing, yet their long-term reliability is not poor at all. The issue here is that the switches are removable, which is both a boon and a curse. This design does allow for the user to easily replace a switch should it go bad, or even for mixing different types of switches on a single keyboard, yet the contacts are not permanently soldered onto the main PCB. Exposed contacts are susceptible to corrosion, which will not happen in a year or even two, but will inevitably happen over enough time.

It is apparent that Redragon released the Devarajas K556 RGB in order to compete against other mechanical gaming keyboards in terms of value, seemingly offering a quality mechanical keyboard with RGB backlighting at a significantly lower $57 retail price. However, the difference in terms of features and versatility over programmable gaming keyboards with better MCUs and proper software is by all means immense. If what you want is a mechanical keyboard with RGB backlight but do not really care about any advanced options, the Devarajas K556 RGB is a solid choice over advanced gaming keyboards that will cost twice as much (or more).

Comments are closed.