Question 1

Can you customize the lighting? Can you pregram different colors?

Accepted Answer

To a degree, yes. You can customize each individual key color (Yellow, Blue, Light Blue, Red, Pink/Purple (looks pink to me), Green, and White) by pressing FN+End twice then pressing the key you want to change to the color you prefer. You can also get a few additional colors (whole board) by pressing FN+Insert and letting it cycle to the color you want (this provides more color/shade options than the main colors listed earlier -- press FN+Insert again to pause on a color. FN+Page Up will cycle the colors across the keyboard and allow for some gradient color patterns on the board -- press FN+Page Up again to pause a gradient). FN+Delete will cycle a rainbow effect across the keyboard which you can also pause if you'd like a static gradient of colors flowing from one side to the other, you can also leave them animated. FN+Home will animate the colors moving from inside (around the J key) outward on the board -- I don't seem to be able to pause it. FN+Page Down looks like it turns the keys off but when you hit a key it will light up -- pressing Fn+Page Down again changes the color. The only color set you can fully customize and "program" to stay the way you set them is the FN+End individual key customization, the others will revert to their normal function upon restart. For example, my QWEASD and number keys are set to Red, my F1-F12, space bar, arrow keys set to White, and the rest set to Light Blue. This color combination has remained stored in the keyboard even after unplugging it from my computer. Brightness is controlled with FN+Up or Down arrow keys. Speed of animated cycles is FN+ the +/- keys. For anyone wondering, the Vara K551-RGB and the Kumara K552-RGB appear to share the same colors/settings, the only difference is the number pad.

Question 2

What is the different between rainbow and RGB backlight?

Accepted Answer

"RGB has programmable lights (any color) but rainbow cannot be changed. Rainbow is only the colors shown in the picture, in that order. Rainbow cannot be changed. RGB can be changed."
Whats the difference between the rgb and rainbow? - Amazon ...

Question 3

Is there a headphone jack?

Accepted Answer

No. We plug headphones into computer.

Question 4

Are the key switches replaceable?

Accepted Answer

Yes they are. You can hot swap the switches with other Outemu key switches.

ASIN	B09FYFB2R9
Additional Features	Ergonomic
Antenna Location	Gaming
Best Sellers Rank	#4,425 in Videogames ( See Top 100 in Videogames ) #273 in PC Gaming Keyboards #401 in Computer Keyboards
Brand	Redragon
Built-In Media	USB Cable
Button Quantity	87
Color	White
Compatible Devices	PC, Mac
Compatible Operating System Family	Windows
Connectivity Technology	USB-A
Country of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (204)
Enclosure Material	crystal
Global Trade Identification Number	04895173510069
Hand Orientation	Ambidextrous
Item Dimensions L x W x H	35.4L x 12.3W x 3.7H centimeters
Item Weight	500 Grams
Keyboard Backlighting Color Support	RGB
Keyboard Description	Mechanical
Keyboard Layout	QWERTY
Keyboard Plate Material	Metal-ABS
Manufacturer	Redragon
Mfr Part Number	K552WH
Model Name	KUMARA K552W
Model Number	K552WH
Number of Items	1
Number of Keys	87
Number of Packs	1
Style Name	Classic
Switch Type	Tactile
Theme	Gaming
Unit Count	1 Count
Warranty Description	1
Water Resistance Level	Not Water Resistant

Redragon K552 Mechanical Gaming Keyboard RGB LED Backlit Wired with Anti-Dust Proof Switches for Windows PC (White, 87 Key Red Switches), USB

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