Keychron K3 Pro Bluetooth Mechanical Keyboard User Guide

: June 9, 2024
: Keychron

Keychron K3 Pro Bluetooth Mechanical Keyboard

IN THE BOX

Keychron K3 pro Bluetooth mechanical Keyboard x 1
Type-C Cable x 1
Manual x 1
Quick Start Guide x 1
Extra Keycaps Set x 1

Quick Start Guide

If you are a Windows user, please find the appropriate keycaps in the box, then follow the instructions below to find and replace the following keycaps.

Connect Bluetooth

Connect Cable

The VIA Key Remapping Software

Please visit caniusevia.com to download the latest VIA software to remap the keys. If the VIA software cannot recognize your keyboard, please reach out to our support to get the instruction. (VIA only works when Your keyboard’s best friend the keyboard is connected by wire to the computer.)

The Layers

There are four layers of key settings on the keyboard. The layer O and layer 1 are for the Mac system. The layer 2 and layer 3 are for the Windows system.

If your system toggle is switched to Mac, then the layer 0 will be activated.

If your system toggle is switched to Windows, then the layer 2 will be activated. Remember that if you are using it in Windows mode, please make changes to the layer 2 instead of the top layer ( the layer 0 ). This is a common mistake people are making.

The Backlight

Press fn + Q to change the lighting effect
Press fn + tab to turn the backlight on/off

Adjust The Backlight Brightness

Press fn + W to increase the backlight brightness
Press fn+s to decrease the backlight brightness

Adjust The Backlight Speed

Press fn + T to increase the light effect speed
Press fn + G to decrease the light effect speed

Warranty

The keyboard is highly customizable and easy to be rebuilt. If anything goes wrong with any of the keyboard components of keyboard during the warranty period, we will only replace the defective parts of the keyboard, not the whole keyboard.

Watch The Building Tutorial On Our Website

If you are building the keyboard for the first time, we highly recommend you watch the building tutorial video on our website first, then start building the keyboard yourself.

Factory Reset

Troubleshooting?

Don’t know what’s going on with the keyboard?

Plug in the power cable and switch the keyboard to Cable mode.
Factory reset the keyboard by pressing fn + J + Z (for 4 seconds).
Download the right firmware and QMK Toolbox from our website.
Switch the keyboard to OFF mode and remove the space bar keycap to find the reset button on the PCB.
Hold the reset key first, then switch the keyboard to Cable mode.
Release the reset key, and the keyboard will now enter DFU mode.
Flash the firmware with the QMK Toolbox.
Factory reset the keyboard again by pressing fn + J + Z (for 4 seconds).

Step by step guide can be found on our website.

K3 pro Bluetooth mechanical Keyboard Specifications

Number of keys: 84
Switch type: Mechanical
Battery: 1550mAh
Charging time: Around 3 hours
Charging port: USB Type-C
Mode: Bluetooth / Wired
Bluetooth operating distance: Within 10 meters (open space)
Name of Bluetooth device: Keychron K3 pro

Operating environment: -10 to 50°C
Technical specifications can be subjected to change without notice, we apologize for any inconvenience caused.

K3 pro Bluetooth mechanical Keyboard Overview

Bluetooth Indicator
Win/Android Mac /IOS (OS Toggle Switch)
BT OFF Cable (Made Toggle Switch)
Charging Port

DEFAULT KEY LAYOUT

LAYER 0: This layer will be activated when your keyboard’s system toggle is switched to Mac.

LAYER 1: This layer will be activated when your keyboard’s system toggle is switched to Mac and press the fn/M0(1) key.

LAYER 2: This layer will be activated when your keyboard’s system toggle is switched to Windows.
LWin = Left Windows LAlt = Left Alt RAlt = Right Alt RCtrl = Right Ctrl

LAYER 3: This layer will be activated when your keyboard’s system toggle is switched to Windows and press the fn/M0(3) key.

KEY DESCRIPTION

Key Description

LED STATUS OVERVIEW

LED Location	Function	Status
Battery indicator	Charging	Low battery – Blinking Red Charging – Static Red

Fully charged – Static Green
Bluetooth indicator| Bluetooth| Pairing – Slow Blinking Paired – Light Off Switching – Fast Blinking

FUNCTION DESCRIPTION

CHARGING

Plug the cable into a USB port and plug the other end into the keyboard port. Charging Indicator:
When battery is below 15%, a red battery blinking indicator will be triggered. A red light will stay on while charging; Fully charged in around 3 hours, a green battery indicator will appear.
*The Keychron keyboard is compatible with all USB ports. Please use a SV 1A adapter or USB 3.0 for the best performance. The Keychron K3 Pro can be charged in Bluetooth/on/off mode.
** This product supports up to SV charging voltage and 1A charging current. We are not responsible for any problems caused by improper charging.

BLUETOOTH / WIRED MODE (MODE TOGGLE SWITCH)

WIRED MODE

Switch the toggle switch to the Cable option (it only works when a USB cable is plugged in).
Connect our cable with your PC and keyboard.
Backlighting will be turned on.
*Under Wired Mode, keyboard will not enter into Battery Saver Mode.

BWETOOTH MODE

Switch the toggle switch to the Bluetooth option.
Backlighting will be turned on.
Hold “fn+1” key for 4 seconds to activate Bluetooth pairing (the Bluetooth indicator fast flashes for 3 minutes to detect pairing).
Search for the Bluetooth device “Keychron K3 Pro” on your device and connect it (the Bluetooth indicator goes off after successful pairing).

Note: This keyboard supports pairing up to 3 devices simultaneously via key combination “fn” + “1” I “fn” + “2” I “fn” + “3”.
*The Bluetooth indicator will continue to flash for 3 minutes.
**Slow or failed connections may exist due to different Bluetooth versions, please make sure all the settings are correct.

SWITCH BWETOOTH DEVICES

Short press key combination “fn” + “1” I “fn” + “2” I “fn” + “3” to switch to other device.

RECONNECT:

Switch the keyboard to the Bluetooth option to activate the keyboard.
The Bluetooth indicator flashes for 3 seconds and automatically pairs with the last paired device.
If the Bluetooth indicator is off, press any button to enter the connection again.

The keyboard must have been paired with the device to perform this function.

TURN OFF THE KEYBOARD

Switch the keyboard to the OFF option.

BACKLIGHT SETTING

Short press to switch between different types of lighting effects.
When backlighting is on, press button to switch among them.

OS TOGGLE SWITCH

MAC/iOS
Switch the toggle to Mac/iOS when the keyboard is connected to a Mac or iOS operating system.
WINDOWS/ANDROID
Switch the toggle to Windows/Android when the keyboard is connected to a Windows or Android operating system.
*When using the Windows/ Android mode, Keys are used for “Windows” and “Alt” functions.

INPUT METHOD SWITCH

ForiOS:
Input method switch: Ctrl + Space
Caps Lock: Caps (Enable General>Keyboards>Hardware Keyboard>Caps Lock Language Switch)
For Android:
Input method switch: Shift+ Space
NOTE: Functions of certain multimedia key may be disabled due to compatibility, versions, brands and drivers of Windows/ Android OS. We also recommend not to switch OS frequently as it may impact keyboard operations.

TROUBLESHOOTING

If unable to pair keyboard to device, confirm that the device you’re trying to pair with is Bluetooth-capable. If so, restart the device and try pairing it with the keyboard again.
Note: On a Windows computer, a new Bluetooth connection will sometimes require additional software updates-a process that may still be ongoing after a message appears indicating a successful completion. Wait at least 20 minutes after pairing to make sure all updates are completed before restarting the computer.
Confirm that the device is configured to accept Bluetooth connections (Windows) and supports an external keyboard (HID profile).

Go to Bluetooth Devices > Open Settings and select the following:
Allow Bluetooth devices to find this computer
Allow Bluetooth devices to connect to this computer
Alert me when a Bluetooth device wants to connect

My keyboard isn’t working.

For the computer/smartphone:
Go to your device Bluetooth settings>Select the keyboard and remove/delete/unpair it.
Then restart your device.

For the keyboard:
Turn the keyboard off and back on. Then reconnect it to your device.

Bluetooth connection is interrupted even within 10 meters.
Check if the keyboard is resting on a metal surface that can interfere with the Bluetooth signal.

Third-party input tools are not compatible with the keyboard.
Due to compatibility, versions, brands and drivers of Windows/ Android OS, functions of third-party input tools may be affected while using the keyboard. Please make sure your operating system and drivers are up to date.

Certain multimedia keys or function keys do not work.

Functions of certain multimedia keys may be disabled due to compatibility, versions, brands, and drivers of devices.

*Multimedia keys:
Function keys:

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter.
Radiation Exposure Statement
The device has been evaluated to meet general RF exposure requirement in portable exposure condition without restriction.

Safety Precaution:
Keep the product, accessories and packaging parts out of the reach of children to prevent any accidents and choking hazards.
Always keep the product dry to avoid corrosion.
Do not expose the product to extreme temperatures below -10°C (5°F) or above 50°C (131 °F) to preserve the lifespan of the keyboard and battery.

Customer Support

Keychron, Inc.
Dover, DE 19901, United States
Find us at:
https://www.keychron.com
Support@keychron.com
@keychron
@keychron
@keychronMK
Designed by Keychron
Made in China