Introduction
Thank you for choosing the Keychron K3 Version 2 Ultra-Slim Wireless Mechanical Keyboard. This manual provides detailed instructions to help you set up, operate, and maintain your keyboard, ensuring optimal performance and longevity. The K3 Version 2 is designed for productivity, offering both wireless Bluetooth and wired USB connectivity, a compact 75% layout, and low-profile mechanical switches.
Setup
1. Initial Charging
Before first use, connect the keyboard to a power source using the provided USB-C cable. The charging indicator light will show the charging status. A full charge is recommended for optimal wireless performance.
2. Connecting via Bluetooth
- Locate the mode switch on the side of the keyboard and set it to "BT" (Bluetooth).
- Press and hold the Fn + 1 key combination for 4 seconds to enter pairing mode. The backlight will flash rapidly.
- On your device (computer, tablet, smartphone), enable Bluetooth and search for "Keychron K3".
- Select "Keychron K3" to pair. Once connected, the backlight will stop flashing.
- To connect to additional devices (up to 3), repeat steps 2-4 using Fn + 2 and Fn + 3.
- Switch between paired devices by pressing Fn + 1, Fn + 2, or Fn + 3.
Image: The Keychron K3 supports up to three Bluetooth connections and a wired USB connection, indicated by BT1, BT2, BT3, and Wired icons.
3. Connecting via USB Wired
To use the keyboard in wired mode, set the mode switch to "Cable". Connect the keyboard to your device using the provided USB-C to USB-A cable. The keyboard will automatically be recognized.
4. Operating System Switch
The K3 Version 2 features a switch to toggle between Mac and Windows layouts. Locate the OS switch on the side of the keyboard and select the appropriate operating system for your device. This ensures correct key mapping for multimedia and function keys.
Image: The Keychron K3 keyboard is compatible with both Mac OS and Windows, featuring dedicated keycaps for both systems.
Operating Instructions
1. Function Keys and Multimedia Controls
The top row of keys serves as both function keys (F1-F12) and multimedia controls.
- Fn + F1-F12: Access standard F-keys.
- F1-F12 (without Fn): Access multimedia functions (e.g., brightness, media playback, volume).
- Fn + Light Key: Cycle through backlight effects.
- Fn + Left/Right Arrow: Adjust backlight brightness.
Image: The Keychron K3 keyboard features a compact 75% layout with dedicated function and multimedia keys.
2. Backlight Control
The K3 Version 2 features a white LED backlight. Use the dedicated backlight key (usually located near the top right) to toggle the backlight on/off or cycle through various lighting effects. Adjust brightness using the function key combinations mentioned above.
Image: The Keychron K3 features a white LED backlight, illuminating the low-profile keycaps and switches.
3. Low-Profile Keycaps and Switches
The keyboard utilizes low-profile ABS keycaps and Keychron Mechanical Brown switches, designed for a tactile typing experience with a shorter travel distance compared to conventional mechanical switches.
Image: The Keychron K3 features low-profile ABS keycaps, contributing to its ultra-slim design.
Maintenance
1. Cleaning the Keyboard
- Disconnect the keyboard from all power sources and devices before cleaning.
- Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe the keycaps and frame.
- For dust and debris between keys, use compressed air.
- Avoid harsh chemicals or abrasive materials that could damage the finish.
2. Battery Care
- To prolong battery life, avoid fully discharging the keyboard frequently.
- Store the keyboard in a cool, dry place if not in use for extended periods.
- If the keyboard will not be used for a long time, charge it to about 50% before storing.
Troubleshooting
- Keyboard not connecting via Bluetooth:
- Ensure the keyboard is in "BT" mode and pairing mode (Fn + 1/2/3 held for 4 seconds).
- Check if Bluetooth is enabled on your device.
- Remove "Keychron K3" from your device's Bluetooth list and attempt to re-pair.
- Ensure the keyboard is sufficiently charged.
- Try connecting to a different Bluetooth slot (Fn + 1, 2, or 3).
- Keys not responding in wired mode:
- Ensure the keyboard is in "Cable" mode.
- Try a different USB port on your device.
- Test with a different USB-C cable.
- Backlight not working or flickering:
- Adjust backlight brightness using Fn + Left/Right Arrow.
- Ensure the keyboard is charged.
- Cycle through backlight effects using the dedicated backlight key.
- Incorrect key mapping (Mac/Windows):
- Verify the OS switch on the side of the keyboard is set to your operating system.
- If issues persist, check the Keychron website for potential firmware updates for your K3 Version 2 model.
Specifications
| Brand | Keychron |
| Model | K3 Version 2 |
| Connectivity Technology | Bluetooth 5.1 (Wireless), USB-C (Wired) |
| Keyboard Description | 75% Layout, Multimedia Mechanical Keyboard |
| Special Feature | Ultra-Slim, Low-Profile Keychron Mechanical Brown Switch, White LED Backlit |
| Compatible Devices | Laptop, PC, Smartphone, Tablet (Mac & Windows) |
| Product Dimensions | 12.05"L x 4.57"W x 0.87"H (306mm x 116mm x 22mm) |
| Material | Acrylonitrile Butadiene Styrene (ABS), Aluminum Frame |
| Switch Type | Keychron Low-Profile Mechanical Brown Switch |
| Switch Operating Force | 47 ± 8 gf |
| Switch Pre-travel | 1.7 ± 0.4 mm |
| Switch Total Travel | 3.1 ± 0.3 mm |
| Switch Behavior | Tactile |
| Switch Lifespan | Up to 50 million keystrokes |
Image: The Keychron K3 keyboard measures 306mm (12.05 inches) in length and 116mm (4.57 inches) in width.
Image: A visual comparison illustrating the ultra-slim body of the Keychron K3 and the reduced height of its low-profile mechanical switches (0.46 inches) compared to conventional switches (0.71 inches).
Image: Detailed specifications for the Low Profile Brown Switch, including operating force, pre-travel, total travel, behavior (tactile), sound level (gentle), and lifespan.
Warranty and Support
Keychron products typically come with a limited warranty. For specific warranty terms, conditions, and duration, please refer to the warranty card included with your product or visit the official Keychron website.
For technical support, troubleshooting assistance, or to inquire about replacement parts, please contact Keychron customer service through their official website: www.keychron.com/pages/contact-us.
