Keychron

Keychron K3 Ultra-Slim 75% Layout RGB Backlit Wireless Bluetooth/Wired USB Mechanical Keyboard, Hot-Swappable Low-Profile Keychron Optical Brown Switch 84-Key Gaming Keyboard for Mac Windows-Version 2

Name: Keychron K3 Ultra-Slim 75% Layout RGB Backlit Wireless Bluetooth/Wired USB Mechanical Keyboard, Hot-Swappable Low-Profile Keychron Optical Brown
Brand: Keychron
SKU: B08LS6FMWC

Status: Keychron K3 Ultra-Slim 75% Layout RGB Backlit…: Unavailable on Amazon as of 2026-10-18 10:26 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

🛒 Search eBay for this model

Bottom line: The Keychron K3 Ultra-Slim 75% Layout RGB Backlit Wireless: Hot-swappable low-profile optical switches, no soldering to change feel; main trade-off: wireless mode drops to 6KRO; full NKRO only over wired USB-C.

Unavailable on Amazon as of 2026-10-18 10:26 UTC

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:

Similar: HK GAMING GK61 Mechanical Gaming Keyboard - 61… — $29.99 on Amazon as of 2026-10-20 22:16 UTC (price may vary).

View Current Price — $29.99

Similar: iClever BK10 Bluetooth Keyboard — $18.52 on Amazon as of 2026-10-21 12:15 UTC (price may vary).

View Current Price — $18.52

Similar: Arteck Universal Backlit 7-Colors Ultra Light… — $24.99 on Amazon as of 2026-10-21 08:15 UTC (price may vary).

View Current Price — $24.99

Original listing (currently unavailable) → Compare to similar gaming peripherals

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-18

Mike Perry — Hardware researcher since 2014. For keyboards, mice, headsets and other PC peripherals, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ Hot-swappable low-profile optical switches, no soldering to change feel
✓ Bluetooth 5.1 pairs 3 devices; hop between laptop, PC, tablet, phone
✓ 84-key 75% layout frees desk space over full-size boards
✓ Low-profile switches 40% slimmer with shorter travel for faster input
✓ Optical Red switch rated to 70 million keystrokes; wired USB-C NKRO

Cons

✗ Wireless mode drops to 6KRO; full NKRO only over wired USB-C
✗ Not compatible with standard MX-style mechanical switches
✗ Plastic bottom frame despite the reinforced aluminum top
✗ 75% layout omits a dedicated numpad

SpecPicks Verdict

SpecPicks scored Keychron K3 Ultra-Slim 75% Layout RGB Backlit Wireless… using a rating × review-volume × price-fit model applied to published specs and reviews across the gaming peripherals category. Keychron's gaming peripherals lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for gaming peripherals of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

Keychron K3, a compact 75% layout 84 keys RGB backlight hot-swappable ultra-slim wireless mechanical keyboard built for peak productivity, a great tactile typing experience, and let you personalize per-key typing experience without soldering.
Be ready to multitask without missing a beat by connecting the K3 with up to 3 devices via the stable Bluetooth 5.1 chipset and switch between your laptop, PC, tablet and phone seamlessly. It also has wired mode with USB Type-C connection.
With a unique Mac layout, the K3 has all the necessary Mac multimedia keys while still being compatible with Windows. Extra keycaps for both Windows and Mac operating systems are included.
The redesigned low-profile Keychron optical switch is 40% slimmer than conventional switches with a shorter pre-travel and total travel distance that triggers an input and feedback faster than conventional/normal-profile mechanical switches. With the reinforced aluminum body (plastic bottom frame) make the K3 one of the thinnest and lightweight mechanical keyboards on the market. Comes with various RGB backlight settings, you can adjust the keyboard brightness to sync with your mood.
You can easily hot-swap every low-profile optical switch without soldering to customize your typing experience on the K3 (*This keyboard is NOT compatible with any conventional MX style mechanical switch). The pre-installed low-profile optical Brown switch provides unrivaled tactile responsiveness with up to 70 million keystroke lifespan, and it supports NKRO on the wired mode or 6KRO on the wireless mode.

Full Specifications

Brand	Keychron
Color	Low-Profile Keychron Optical Brown Switch
Style	Contemporary
Theme	Productivity and Gaming
Generation	2
Model Name	K3
Style Name	Contemporary
Unit Count	1 Count
Switch Type	Low-Profile Keychron Optical Brown Switch
Connectivity	Bluetooth, USB
Model Number	K3E
Power Source	Rechargeable Battery
Compatibility	PC, Switch, Mac
Series Number	3
Built-In Media	Keycaps for Windows and Mac operating systems
Number of Keys	84
Button Quantity	84
Connection Type	Wired
Keyboard Layout	QWERTY
Mfr Part Number	K3-E3-USA

Ready to buy?

Amazon shows no buyable offer for Keychron K3 Ultra-Slim 75% Layout RGB Backlit… at the last check. A similar in-stock product is HK GAMING GK61 Mechanical Gaming Keyboard - 61…. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $29.99