Keychron

Keychron B4 Pro Ultra-Slim 96% Wireless Keyboard

Status: Keychron B4 Pro Ultra-Slim 96% Wireless Keyboard: Unavailable on Amazon as of 2026-10-21 10:17 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 B4 Pro Ultra-Slim 96% Wireless Keyboard is a specs-and-price decision rather than a crowd-consensus one in the gaming peripherals category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

Unavailable on Amazon as of 2026-10-21 10:17 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: Lenovo Legion M600s RGB Wireless Gaming Mouse — $71.99 on Amazon as of 2026-10-21 06:16 UTC (price may vary).

View Current Price — $71.99

Similar: Logitech MK270 Wireless Keyboard and Mouse Combo… — $79.96 on Amazon as of 2026-10-21 16:17 UTC (price may vary).

View Current Price — $79.96

Similar: Lenovo 530 Full Size Wireless Computer Mouse for… — $9.99 on Amazon as of 2026-10-21 22:15 UTC (price may vary).

View Current Price — $9.99

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

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-21

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

✓ Backed by Keychron's warranty and support channels

Cons

✗ Check the listed dimensions, connectors and platform compatibility against your setup before ordering
✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

SpecPicks Verdict

SpecPicks scored Keychron B4 Pro Ultra-Slim 96% Wireless Keyboard 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

Ultra-Slim 96% Wireless Keyboard with Numpad: The Keychron B4 Pro is a slim, lightweight and portable wireless keyboard featuring a compact 96% layout that saves desk space while retaining number pad. It supports wireless and wired connections, offering seamless compatibility with phones, tablets, PCs, and Macs.
2.4 GHz & Bluetooth Connectivity: With up to 1000 Hz polling rate in both 2.4 GHz and wired modes, the B4 Pro delivers smooth, low-latency performance for productivity. Effortlessly switch between devices via Bluetooth 5.2, making multitasking across your phone, tablet, and laptop simple and responsive.
Compatible with All Devices: Fully compatible with macOS and Windows, the B4 Pro lets you switch between multimedia and function keys using Fn + X + L. A handy side toggle instantly changes OS modes—perfect for users who move between multiple platforms and devices.
Up to 300 Hours of Battery Life: Powered by an 800 mAh battery, the B4 Pro offers up to 300 hours of continuous use on a single charge. Create, work, or game longer without worrying about frequent recharging—perfect for professionals on the go.
Program with the Keychron Launcher Web App: Remap any key and create macros effortlessly using the Keychron Launcher web app. It runs directly in your browser on macOS, Windows, and Linux—no installation required.
Ultra-Slim Body with Round Keycaps: The ultra-slim body paired with rounded keycaps delivers precise input and lasting comfort. Designed to match your fingertips’ natural shape, they help reduce typing errors and improve overall efficiency.

Full Specifications

Brand	Keychron
Color	Space Gray
Language	English
Material	Acrylonitrile Butadiene Styrene
Model Name	B4P-K1
Unit Count	1 Count
Battery Life	300 hours
Connectivity	Bluetooth, 2.4GHz
Model Number	B4 Pro
Power Source	Battery Powered
Compatibility	Switch, Mac, Linux
Built-In Media	Keyboard x1, Silicone Skin x1, Type-A 2.4 GHz Receiver x1, Type-A to Type-C Adapter x1, Type-C Cable x1
Number of Keys	100
Connection Type	Wired
Keyboard Layout	QWERTY
Number of Items	1
Number of Packs	1
Special Feature	Customizable Display Keys, Lightweight, Round Key, Silent, Ultra-Slim & Portable
Antenna Location	Business, Office, Personal
Compatible Devices	Laptop, PC, Tablet
Full listing title	Keychron B4 Pro Ultra-Slim 96% Wireless Keyboard, Bluetooth/2.4 GHz/Wired Connection Keyboard with Numpad, Launcher, Up to 300 Hours Battery Compatible with Mac Windows Linux - Space Gray

Ready to buy?

Amazon shows no buyable offer for Keychron B4 Pro Ultra-Slim 96% Wireless Keyboard at the last check. A similar in-stock product is Lenovo Legion M600s RGB Wireless Gaming Mouse. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $71.99