Cl Pro Tenkeyless Mechanical Keyboard
User Guide
IN THE BOX:
Keychron C1 Pro Tenkeyless 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. 
- Switch To The Right System
Please make sure the system toggle on the top left corner has been switched to the same system as your computer’s operating system.
- 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.
- The Layers
There are four layers of key settings on the keyboard. The layer 0 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
- Adjust The Backlight Brightness
- Activate Siri / Cortana
For Sid on Mac: Go to System preferences > Sid > select “Hold Command Space° option.
*Sid key only works on macOS and does not work on iOS.
For Cortana on Windows: Select Start > Settings > Cortana and select the shortcut by pressing Windows key + C key. ‘Windows Cortana is only available for Windows 10 and above OS. Cortana is only available in certain countries / regions and might not work everywhere.
- 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
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.
For Cortana on Windows: Select Start > Settings > Cortana and select the shortcut by pressing Windows key + C key. ‘Windows Cortana is only available for Windows 10 and above OS. Cortana is only available in certain countries / regions and might not work everywhere.
Troubleshooting? Don’t know what’s going on with the keyboard?
- Plug in the power cable and factory reset the keyboard by pressing fn + J + Z (for 4 seconds).
- Download the right firmware and QMK Toolbox from our website.
- Unplug the power cable and remove the space bar keycap to find the reset button on the PCB.
- Hold the reset key first, then plug in the power cable. 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.
Cl PRO TENKEYLESS MECHANICAL KEYBOARD SPECIFICATIONS
| Specifications | |
| Layout | TKL |
| Switch type | Mechanical |
| Width | 129.3 mm |
| Length | 355.5 mm |
| Front height | 17 mm (without keycaps) 27.1 mm (with keycaps installed) |
| Back height | 28 mm (without keycaps) 37.4 mm (with keycaps installed) |
| Keyboard feet height | 2 mm |
| Angle | 4.8 / 8.5 / 10.7 degree |
Cl PRO TENKEYLESS MECHANICAL KEYBOARD OVERVIEW
- Caps Lock Indicator
- Mac Layout
- Windows Layout
- Win/Android Mac/iOS (OS Toggle Switch)
- Type-C 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/MO(1) key. 
LAYER 2: This layer will be activated when your keyboard’s system toggle is switched to Windows. 
LWin=Left Windows LAIt=Left Alt RAIt=Right Alt RWin=Right Windows
LAYER 3: This layer will be activated when your keyboard’s system toggle is switched to Windows and press the fn/MO(3) key. 
KEY DESCRIPTION
| Key Description | |
| Scr- | Screen Brightness Decrease |
| Scr+ | Screen Brightness Increase |
| Bright- | Backlight Decrease |
| Bright+ | Backlight Increase |
| Prvs | Previous |
| Play | Play/Pause |
| Next | Next |
| Mute | Mute |
| Vol- | Volume Decrease |
| Vol+ | Volume Increase |
| RGB Toggle | Turn Backlight on/off |
| Key Description | |
| RGBMd+ | RGB Mode Next |
| RGBMd- | RGB Mode Previous |
| Hue+ | Hue Increase |
| Hue- | Hue Decrease |
| RGB SPI | RGB Speed Increase |
| RGB SPD | RGB Speed Decrease |
| MO(1) | Layer 1 will be activated when holding this key |
| MO(2) | Layer 2 will be activated when holding this key |
| MO(3) | Layer 3 will be activated when holding this key |
| MO(4) | Layer 4 will be activated when holding this key |
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: 
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.
Keychron, Inc.
Dover, DE 19901, United States
Find us at:
https://www.keychron.com
[email protected] 
@keychron
@keychron
@keychronMK
Designed by Keychron
Made in China
