The product dimensions say that this keyboard is 5" high, surly that is the height of the box. Can any owners approximate the height of the unit?

1 inch at bottom edge to 1 1/2-inches at top edge.

Logitech says the keyboard with brown switches is "k845: 920-00986", however, the one received is marked "k845: 820-009572". what is the difference?

Not sure where you got your P/Ns, but check the Logitech website, the P/N listed under Specs & Details for brown keys is 920-009862. I presume you might have a keyboard with different color keys, but there isn’t a 820-009572

No, it doesn't have a USB pass-through.

I am 90% sure that the keycaps are PBT. The surface is not smooth like it would be if they were ABS. Also, since they are dual injected, black for the key and white for the markings, the markings will never get damaged or fade. However, the markings definitely need the LED light built into the MX Switch to make them visible.

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Logitech K845 Mechanical Illuminated Keyboard, Mechanical Switches, Strong Adjustable Tilt Legs, Full Size, Aluminum Top Case, 104 Keys, USB Corded, Windows (TTC Brown Switches)

Logitech K845 Mechanical Illuminated Keyboard, Mechanical Switches, Strong Adjustable Tilt Legs, Full Size, Aluminum Top Case, 104 Keys, USB Corded, Windows (TTC Brown Switches)

Product ID: 240360968

Details

Brand
Logitech
Color
TTC Brown
Compatible Devices
Gaming Console
Connectivity Technology
USB
Keyboard Description
Standalone
Keyboard backlighting color support
Single Color

💡5 customizable white backlight modes

⚙️104 tactile mechanical keys

🖥️4-8° adjustable tilt legs

Description

⌨️ Elevate your desk game with precision, style, and lasting comfort!

SLEEK DURABILITY - Premium aluminum top case built to last through intense work sessions.
FULL SIZE EFFICIENCY - 104 keys including numpad and FN keys in a compact footprint.
PRECISION MEETS COMFORT - Adjustable tilt legs (4-8°) for ergonomic typing all day.
ILLUMINATE YOUR WORKFLOW - Five white backlight patterns to keep you productive in any lighting.
TAILORED TACTILE FEEDBACK - Choose TTC Brown switches for quiet, tactile responsiveness.

The Logitech K845 Mechanical Illuminated Keyboard combines durable aluminum construction with customizable TTC Brown mechanical switches and adjustable tilt legs, delivering a premium full-size typing experience enhanced by five white backlighting modes—perfect for professionals seeking ergonomic comfort and sleek design in a wired USB keyboard.

Specifications

ASIN	B089YFHYYS
Additional Features	Lighting
Antenna Location	Gaming
Best Sellers Rank	#208 in Computer Keyboards
Brand	Logitech
Built-In Media	USB Cable
Button Quantity	104
Color	TTC Brown
Compatible Devices	Gaming Console
Compatible Operating System Family	Windows
Connectivity Technology	USB
Customer Reviews	4.4 out of 5 stars 3,162 Reviews
Enclosure Material	Aluminum
Hand Orientation	Ambidextrous
Item Dimensions L x W x H	435"L x 127"W x 27.8"H
Item Type Name	Mechanical Wired Keyboard
Item Weight	35.63 Ounces
Keyboard Backlighting Color Support	Single Color
Keyboard Description	Standalone
Keyboard Layout	QWERTY
Keyboard Plate Material	Aluminum
Manufacturer	Logitech
Mechanical Keyboard Switch Model	TTC Brown
Mfr Part Number	920-009862
Model Name	K845
Model Number	920-009862
Number of Keys	104
Power Source	USB power
Recommended Uses For Product	Gaming
Special Feature	Lighting
Style Name	TTC
Switch Type	Tactile
UPC	097855161642
Unit Count	1.0 Count
Warranty Description	1 Year Limited Hardware Warranty

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