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, Quiet USB Wired Computer Keyboard, Full Size with White Illuminated LED, Compatible for Windows Desktop, Laptop, PC, Gaming, Black

KOPJIPPOM Large Print Backlit Keyboard, Quiet USB Wired Computer Keyboard, Full Size with White Illuminated LED, Compatible for Windows Desktop, Laptop, PC, Gaming, Black

Product ID: 433336900

Details

Brand
KOPJIPPOM
Colour
Black
Compatible devices
PC
Connectivity technology
USB
Keyboard backlighting colour support
Single Color
Keyboard description
Gaming

💡Adjustable white LED backlight

💧Spill-resistant design

🔠4X larger print for easy visibility

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Description

🔠 Light up your productivity with clarity and comfort!

SEE EVERY KEY CLEARLY - 4X larger font size reduces eye strain and boosts typing accuracy—perfect for professionals who demand clarity.
PLUG PLAY SIMPLICITY - No drivers needed—just plug into any Windows PC, Mac, or Raspberry Pi and get typing instantly.
ILLUMINATE YOUR WORKFLOW - Customizable white LED backlighting with 3 brightness levels keeps you productive in any lighting environment without glare.
BUILT TO LAST SPILL PROOF - Durable membrane keys withstand over 5 million presses and resist accidental spills—because your workflow can’t stop.
ERGONOMIC COMFORT FOR LONG HOURS - Adjustable rear feet reduce hand fatigue, making marathon work or gaming sessions effortless.

The KOPJIPPOM Large Print Backlit Keyboard combines 4X larger key fonts with adjustable white LED backlighting to enhance visibility and reduce eye strain. Designed for full-size comfort with ergonomic tilt and a spill-resistant membrane, it offers plug-and-play USB compatibility across Windows, Mac, and Raspberry Pi devices. Ideal for professionals seeking a durable, easy-to-use keyboard that performs flawlessly in low-light environments.

Specifications

ASIN	B09LH4KF5H
Antenna Location	Office
Best Sellers Rank	164,600 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 2,555 in Keyboards (Computers & Accessories) 7,774 in PC Consoles, Games & Accessories
Box Contents	USB Cable
Brand Name	KOPJIPPOM
Button Quantity	104
Colour	Black
Compatible Devices	PC
Compatible Operating System Family	MacOS, 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 (3,393)
Enclosure Material	Acrylonitrile Butadiene Styrene
Hand Orientation	Ambidextrous
Item Dimensions L x W x H	45L x 16W x 2.5H centimetres
Item Weight	690 Grams
Keyboard Backlighting Color Support	Single Color
Keyboard Description	Gaming
Keyboard Layout	QWERTY
Manufacturer	KOPJIPPOM
Number of Keys	104
Number of Sections	2
Power Source	Corded Electric
Product Features	Backlit
Style Name	Classic
Switch Type	Membrane
Theme	Office
Unit Count	1.0 count
Water Resistance Level	Waterproof

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