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

💧Spill-resistant design

🔠4X larger print for easy visibility

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Description

⌨️ Type Boldly, Work Brightly, Stay Ahead!

SEE EVERY KEY CLEARLY - 4X larger fonts make typing effortless, perfect for professionals who value speed and accuracy without eye strain.
PLUG PLAY SIMPLICITY - USB wired connection with no drivers needed means instant setup and seamless compatibility across Windows, Mac, and Raspberry Pi devices.
WORK ANYTIME ANYWHERE - Bright white LED backlighting with adjustable brightness ensures flawless typing in any lighting condition, from late-night projects to dim office spaces.
BUILT TO LAST SPILL PROOF - Durable membrane keys withstand over 5 million presses and resist spills, so your workflow stays uninterrupted no matter what.
ERGONOMIC COMFORT FOR LONG HOURS - Full-size layout with foldable feet reduces hand fatigue, empowering marathon work or gaming sessions without discomfort.

The KOPJIPPOM Large Print Backlit Keyboard combines 4X larger key fonts with bright, adjustable white LED backlighting to enhance visibility and reduce eye strain. Designed for professionals and users with visual needs, it features a full-size 104-key layout with ergonomic foldable feet for comfort during extended use. Its USB wired plug-and-play design ensures broad compatibility without driver hassles, while a spill-resistant membrane build guarantees durability and reliability in busy work environments.

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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