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

Product ID: 394972047

Details

Brand
KOPJIPPOM
Color
black
Compatible Devices
PC
Connectivity Technology
USB USB-A
Keyboard Description
Membrane
Keyboard backlighting color support
Single Color

💡Adjustable white LED backlight for low-light typing

💧Spill-resistant design for durability

🔠4X larger print for effortless visibility

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Description

⌨️ Type Boldly, See Clearly, Work Brighter!

SEE EVERY KEY CLEARLY - 4X larger fonts make typing effortless, perfect for professionals who demand precision and speed.
PLUG PLAY SIMPLICITY - USB wired connection with broad OS compatibility means zero setup hassle—just connect and conquer.
ILLUMINATE YOUR WORKFLOW - Customizable white LED backlighting ensures productivity even in dim environments—no more missed keystrokes after hours.
BUILT TO LAST SPILL PROOF TOUGH - Durable membrane keys withstand over 5 million presses and accidental spills, keeping your workflow uninterrupted.
ERGONOMIC COMFORT FOR LONG SESSIONS - Adjustable feet reduce hand fatigue, letting you power through work or gaming marathons with ease.

The KOPJIPPOM Large Print Backlit Keyboard combines 4X larger key fonts with adjustable white LED backlighting and an ergonomic full-size layout. Designed for professionals who value clarity and comfort, it features spill-resistant durability and plug-and-play USB compatibility across Windows and Mac systems. Ideal for office, gaming, and low-light environments, this keyboard ensures precision typing with lasting reliability.

Specifications

ASIN	B09LH4KF5H
Additional Features	Backlit, Ergonomic, Hotkeys and Media Keys, Lightweight, Waterproof
Antenna Location	Office
Best Sellers Rank	#45 in Computer Keyboards
Brand	KOPJIPPOM
Built-In Media	USB Cable
Button Quantity	104
Color	black
Compatible Devices	PC
Compatible Operating System Family	MacOS, Windows
Compatible Tablet Computer Models	Samsung Galaxy Tab S7 FE 12.4"
Connectivity Technology	USB, USB-A
Customer Reviews	4.5 4.5 out of 5 stars (3,558)
Enclosure Material	Acrylonitrile Butadiene Styrene
Hand Orientation	Ambidextrous
Item Dimensions L x W x H	17.7"L x 6.3"W x 0.98"H
Item Weight	690 Grams
Keyboard Backlighting Color Support	Single Color
Keyboard Description	Membrane
Keyboard Layout	QWERTY
Manufacturer	KOPJIPPOM
Number of Keys	104
Number of Sections	2
Power Source	USB
Style Name	Classic
Switch Type	Membrane
Theme	Office
Unit Count	1.0 Count
Water Resistance Level	Waterproof

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