Question 1

Is this one of those keyboards that has the really satisfying clicking when you type? I felt one at best buy and I loved it

Accepted Answer

There are 2 distinct aspects to this: There is an audible click like the Cherry Blue-s or their clones.  Depending on the switch used. the keyboard and the keycap, this may  start  out really pleasing, or you ( or your frields at the next desk) 
may get tired of it.   Then there is a tactile bump. Most people like this.    The sound itself has 2 components: The click, which is high pitched, and the "tock" as the key is hitting the keybed.  This is a flat, unpleasant sound to most. 
The click and the tock combine into a single noise as you hit the key(s) typically pretty fast.  So you end up with a "Thck"  sound.   
After a while, some people who like the Cherry blue type clicky keyboards end up wanting something tactile, but a bit quieter.  I found through experimentation, that I can eliminate the 2nd component, the bottom-out "tock" by adding o-rings to the keycap stems. 
Either a 0.4mm. or double 0.2mm rings.   This brings the Cherry blue sound into a more civilized and pleasant realm. This is where I am at,   Tried some quiet tactile switches , e.g. Halo Clear-s , and those are not tactile enough for me.   I modeified a couple of  keybpards ) A coolermaster 10kless
that came with genuine cherry blues, and the K552 ( which came with the Outemu blue Cherry mx blue clones. Added the o-rings, and the result is quite satisfying.  Still clicky, but overall more quiet and pleasant sounding.   The Captain O-ring 0.4mm blue o-rings qoeked well for me. 
Talking abuot sounds, the K552 ( and also its full size brother, the K551) adds a metallic ringing echo to the key sound.

Question 2

Is there a way to toggle the lights? only half my keyboard lights up. the qwerasdgb keys are backlight. did i toggle something accidentally?

Accepted Answer

This is most likely a "mode". Fn+INS cycles through the 9 modes.
Fn+PgUp resets all current settings, including both custom presets or schemes, current mode, and current backlight level.

This is specific to the model K552-KR. The model is printed on the back of the keyboard, and I received the K552-KR (Kumara) from the listing for the black keyboard.

One of the modes is "Zone-Defined". In this mode, pressing Fn and a number key (0-9) cycles through 8 predefined zone modes, and two custom modes.

The custom ones are Fn+9 and Fn+0.

When the keyboard is first plugged in, and the mode is cycled to "Zone-Defined", it defaults to the first preset, Fn+1, "First Person Shooter mode" where the only Esc, WASD, and Arrow keys are lit.

With the mode set to "Zone-Defined", and either Fn+9 or Fn+0 set, press Fn+Home to start recording a custom scheme or preset. To indicate the keyboard is in recording mode, the Caps Lock and Scroll Lock lights on the Redragon badge on the right side of the keyboard will pulse.

While recording, press any key to turn the backlight on for that key. Press again to turn it off.

The color and brightness can not be set individually for this model, only whether it's on or off.

Press Fn+End to save the preset.

Note that the backlight on the Fn is toggled as Fn+End is pressed, so if you don't want the Fn key to be lit in this preset, press it once to turn it on, the press Fn+End to save the preset, and in so doing, the backlight for the Fn key will be turned off just before saving it.

Fn+Up/Down brightens and dims the light for every key simultaneously.

Fn+Left/Right slows down and speeds up the rate of some of the animations in the different modes.

Fn+W toggles "left hand mode, where the function of WASD is swapped with the Up, Left, Down, and Right arrow keys. Pressing again swaps the function of the four letter keys and the direction keys again.

Fn+Windows toggles whether pressing the Windows key sends a Windows key keypress or not, but does not disable animations or backlight for the key.

Fn+F12 toggles "lockout mode", which disables the keyboard, so that pressing any keys or combination of keys does not send any keypresses to whatever it's plugged into. The keyboard still responds to the key combinations mentioned above.

Question 3

Please someone give me some details about the Reddragon K552 KUMARA mechanical keyboard, build / feel / overall performance? thanks!

Accepted Answer

It's sturdy AF and kinda heavy so it doesn't slide around your desk.  I've had mine for several months now and haven't noticed any issues.  It is very satisfying to type on.  I really enjoy the clicky blue switches.  I play all sorts of games including FPSs and unlike the other person who answered it doesn't bother me at all to play games on this awesome KB.  I've been told by coworkers that I'm NOT light/gentle on my keyboard but I also type hella fast.  If you type fast and aren't light on the fingers this KB will create a noticeable din.  The RGB is well lit and I had fun playing with all the light features including the one memory slot to completely customize every single keycap's light.  You cannot custom animate the light for each key but the pre-installed options available seem plenty since you can cycle through all the colors including one option for all the colors and this works well on all the different animations.  For example, there's a matrix style 'rain' animation which you could keep as classic green or the other several colors available, OR you can go all colors in which case you'll see the rain animation but each drop is changing color as it moves down the keys and the lingering/fading trails are also going through RGB.

Question 4

What is the exact usb cable length?

Accepted Answer

It’s 6ft 3 inches

Brand	Redragon
Product Dimensions	899.16 x 312.42 x 93.98 cm; 875 g
Item model number	K552-RGB
Manufacturer	Redragon
Series	KUMARA K552 RGB Red
Color	Black
Computer Memory Type	SIMM
Number of USB 2.0 Ports	1
Voltage	5 Volts
Power Source	USB
Hardware Platform	PC
Operating System	Windows,Windows 10
Are Batteries Included	No
Item Weight	875 g

RedragonK552-RGB Arabic and English Compact Mechanical Gaming Keyboard Backlit Wired with Anti-Dust Proof Switches for Windows PC (Black, 87 Key Red Switches)

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