How to adjust the bightness of the back light?

In the bottom row of keys, there's one to the right of the space bar that has an icon on it that looks like the sun. It's between the Function key (FN) and the Control key (Ctrl). According to the user's manual which came with the keyboard, tapping that key will turn the light on or off. For a "breathing light" (cycle between bright and dim), hold down the FN key and tap the sun icon. Release the FN key, and the light will cycle, from bright to dim to bright to dim etc. - the so-called "breathing light" (I don't use it, as I find it distracting). To simply change the brightness level, hold down the FN key and tap the PU key (Page Up) to brighten the light, or tap PD (Page Down) to dim it. When you have the brightness you want, release the FN key. Works for me ... maybe make a note of it?

what are the dimensions of each key?

Most keys are 5/8" square (16 mm). Judge the large keys from this.

Since seller did not send manual and a reviewer explained fn key, anyone knows what keys ps, sl , pb and pu are for ?

PS - Print Screen SL - Scroll Lock PB - Pause/Break PU - Page Up

does the keyboard light have a time out?

The light is on unless you turn off your computer, put your computer to sleep or there is a key on the keyboard that lets you choose to have the light off.

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KopJippom Large Print Backlit Keyboard, Silent USB Wired Computer Keyboard, Full Size Keyboard with White Illuminated LED Compatible for Windows, Mac OS Desktop, Laptop, PC, Gaming, Black

KopJippom Large Print Backlit Keyboard, Silent USB Wired Computer Keyboard, Full Size Keyboard with White Illuminated LED Compatible for Windows, Mac OS Desktop, Laptop, PC, Gaming, Black

Product ID: 467813822

Details

Brand
KOPJIPPOM
Compatible devices
PC
Connectivity technology
USB
Keyboard description
Accessible
Recommended uses for product
Gaming Office

💡Adjustable white LED backlight

💧Spill-resistant design

🔠4X larger print for easy visibility

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Description

🔠 Illuminate your productivity with every keystroke!

SEE EVERY KEY CLEARLY - 4X larger fonts make typing effortless, perfect for professionals who value precision and speed.
PLUG PLAY SIMPLICITY - No drivers needed—just connect via USB and get to work on Windows, Mac, or Raspberry Pi instantly.
WORK ANYTIME ANYWHERE - Bright white LED backlight with adjustable brightness ensures flawless typing in any lighting condition.
BUILT TO LAST SPILL PROOF - Durable membrane keys withstand over 5 million presses and resist accidental spills, keeping your workflow uninterrupted.
ERGONOMIC COMFORT FOR LONG HOURS - Fold-out feet reduce hand fatigue, supporting marathon work or gaming sessions without strain.

The KopJippom Large Print Backlit Keyboard combines 4X larger fonts with a bright, adjustable white LED backlight to enhance visibility and reduce eye strain. Designed ergonomically with fold-out feet, it supports comfortable long-term use. Compatible across major OS platforms via USB plug-and-play, this full-size 104-key keyboard features a spill-resistant membrane build rated for over 5 million keystrokes, making it a reliable and stylish choice for professionals, gamers, and anyone seeking enhanced typing clarity.

Specifications

ASIN	B09LH4KF5H
Additional Features	Ergonomic
Antenna Location	Gaming, Office
Best Sellers Rank	#52,362 in Computers ( See Top 100 in Computers ) #1,354 in Computer Keyboards
Brand	KOPJIPPOM
Built-In Media	USB Cable
Button Quantity	104
Color	black
Compatible Devices	PC
Compatible Operating System Family	Windows
Compatible Tablet Computer Models	Samsung Galaxy Tab S7 FE 12.4"
Connectivity Technology	USB
Customer Reviews	4.5 4.5 out of 5 stars (3,417)
Enclosure Material	Acrylonitrile Butadiene Styrene
Hand Orientation	Ambidextrous
Item Dimensions L x W x H	45L x 16W x 2.5H centimeters
Item Weight	690 Grams
Keyboard Backlighting Color Support	Single Color
Keyboard Description	Accessible, Backlit
Keyboard Layout	QWERTY
Manufacturer	KOPJIPPOM
Number of Keys	104
Number of Sections	2
Power Source	Corded Electric
Style Name	Modern
Switch Type	Membrane
Theme	No theme
Unit Count	1 Count
Water Resistance Level	Waterproof

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