Keychron B35 Wireless Keyboard User Manual

Keychron B35 Wireless Keyboard

Specifications

• Model: Keychron B35
• Battery: 800 mAh
• Charging Port: Type-C
• Connectivity: 2.4GHz Wireless, Bluetooth, Wired (Type-C)
• Operating System Compatibility: Mac, Windows
• Polling Rate (2.4GHz): 1000Hz
• Polling Rate (Bluetooth): 125Hz
• Polling Rate (Wired): 1000Hz
• Dimensions: 98 keys
• Weight: 320g

Package Contents:

• Keychron B35 Keyboard x 1
• Type-A to C Cable x 1
• Type-A 2.4GHz Receiver x 1

Usage Instructions

Safety Precautions
Keep the product, accessories, and packaging parts out of the reach of children to prevent any accidents.

Connectivity Modes
The Keychron B35 supports three connection modes: 2.4GHz Wireless, Bluetooth, and Wired (Type-C).

2.4GHz Wireless Connection

1. Plug the 2.4GHz USB receiver into your computer’s USB port.
2. Toggle the keyboard switch to ‘G’ (2.4GHz mode).
3. Press fn + 4 to activate 2.4GHz pairing. The keyboard should connect automatically.

Bluetooth Connection

1. Toggle the keyboard switch to ‘BT’ (Bluetooth mode).
2. Press and hold fn + 1 for 3 seconds to enter pairing mode for Bluetooth device 1. The LED will flash rapidly.
3. On your computer or device, search for “Keychron B35” in the Bluetooth settings and connect.
4. To connect to other Bluetooth devices, repeat the process using fn + 2 or fn + 3.

Wired Connection

1. Connect the Type-A to C cable from your computer to the keyboard’s Type-C port.
2. Toggle the keyboard switch to the wired mode (usually indicated by a cable icon or ‘USB’).

Switching Between Operating Systems (Mac/Windows)
To switch between Mac and Windows layouts:

• For Mac layout: Toggle the OS switch to ‘Mac’.
• For Windows layout: Toggle the OS switch to ‘Win’.

Multimedia Keys (F1-F12)
The F1-F12 keys have dual functions. To access the multimedia functions (e.g., volume control, play/pause), press the fn key simultaneously with the desired F key.

Mac Layout (Default F-keys as multimedia):

• F1: Screen Brightness Down
• F2: Screen Brightness Up
• F3: Mission Control
• F4: Launchpad
• F5: Search
• F6: App Settings
• F7: Previous Track
• F8: Play/Pause
• F9: Next Track
• F10: Mute
• F11: Volume Down
• F12: Volume Up

Windows Layout (Default F-keys as standard F-keys):

• F1-F12: Standard F-keys
• fn + F1: Screen Brightness Down
• fn + F2: Screen Brightness Up
• fn + F3: Task View
• fn + F4: File Explorer
• fn + F5: Search
• fn + F6: System Settings
• fn + F7: Previous Track
• fn + F8: Play/Pause
• fn + F9: Next Track
• fn + F10: Mute
• fn + F11: Volume Down
• fn + F12: Volume Up
• fn + Calc: Calculator
• fn + Lock Win: Lock Windows

Resetting the Keyboard

• Factory Reset: Press and hold fn + J + Z for 3 seconds. This will reset all settings to default.
• Bluetooth Reset: Press and hold fn + X + L for 3 seconds to clear all Bluetooth pairing records.

Keychron Launcher App
Download the Keychron Launcher app from launcher.keychron.com to customize key assignments, macros, and lighting effects. The Launcher app is compatible with Chrome, Edge, and Opera browsers.

Charging
Connect the keyboard to a 5V-1A USB power source using the provided Type-A to C cable. The LED indicator will show charging status.

Troubleshooting

Keyboard not connecting via 2.4GHz:

• Ensure the 2.4GHz USB receiver is securely plugged into a working USB port.
• Make sure the keyboard switch is set to ‘G’ mode.
• Press fn + 4 to re-initiate 2.4GHz pairing.
• Try plugging the receiver into a different USB port.
• Ensure the distance between the keyboard and receiver is within 20cm during pairing.

Keyboard not connecting via Bluetooth:

• Ensure the keyboard switch is set to ‘BT’ mode.
• Press and hold fn + 1 (or fn + 2 / fn + 3 for other slots) for 3 seconds until the LED flashes rapidly.
• Make sure Bluetooth is enabled on your device and search for “Keychron B35”.
• If previously paired, try removing “Keychron B35” from your device’s Bluetooth list and re-pairing.
• Perform a Bluetooth reset by holding fn + X + L for 3 seconds.

Keyboard not responding in wired mode:

• Ensure the Type-C cable is securely connected to both the keyboard and your computer.
• Make sure the keyboard switch is set to the wired mode.
• Try using a different USB port on your computer or a different Type-C cable.

Multimedia keys not working:

• Ensure the keyboard is set to the correct operating system (Mac/Win) using the OS switch.
• Remember to press the fn key simultaneously with the F key to activate multimedia functions, especially in Windows mode where F-keys are default.

Keyboard frequently disconnects:

• For 2.4GHz and Bluetooth, ensure there are no major obstructions between the keyboard and the receiver/device.
• Avoid placing the keyboard near strong electromagnetic interference sources (e.g., Wi-Fi routers, other wireless devices).
• Ensure the keyboard battery is sufficiently charged.

Description

Silent Typing
This keyboard features fully pre-lubed keys, ensuring exceptionally smooth keystrokes with minimal friction and a consistent feel across every key. It delivers an ultra-quiet typing experience that’s ideal for shared spaces, office work, or late-night gaming. 

Program B35 with Keychron Launcher.
Unlock limitless customization with Keychron Launcher web app, enabling easy key remapping, macros, shortcuts, and more.

Wireless and Wired
Enjoy excellent performance with the B35’s 2.4 GHz wireless connection, featuring a swift 1000 Hz polling rate for a cable-free and tidy setup. Effortlessly switch between devices using Bluetooth 5.2, enabling smooth multitasking. Wired (USB-C) – for a stable, plug-and-play connection and charging at the same time.

Plug-and-Play Receiver
For a better 2.4 GHz wireless experience, the B35 comes with a Type-A receiver. Enjoy the quick plug-and-play time. Or, put it away in the keyboard magnetic storage slot at the top right corner.

Suitable For All Devices
The B35 has a system toggle to switch between Windows and macOS systems. And you can even configure different keymaps for both devices. Our Keychron Launcher web app is compatible with macOS, Windows, and Linux.

Continuous Usage
Our B35 keyboard is equipped with an 800mAh rechargeable battery, providing impressive long-lasting performance. With intelligent power management and efficient wireless connectivity, it can deliver up to 320 hours of continuous use on a single charge. This ensures you enjoy extended battery life without frequent charging—perfect for a truly wireless, uninterrupted experience.

Convenient Shortcut Keys
The B35 is designed with user-friendly shortcut functionality, allowing you to easily switch between multimedia controls (like volume, play/pause, and brightness) and standard function keys (F1–F12). By pressing Fn + X + L for three seconds, you can seamlessly toggle between these two modes.

Ergonomic Support
The easily adjustable angles (6.5º/ 9º) bring out the best typing experience to provide long-lasting ergonomic support for your wrist. The slightly taller keycaps helps prevent wobbling and reducing fatigue even during long typing sessions.

What’s in the box?

• Keyboard
  1x Fully Assembled Keyboard
• Cable
  1x Type-A to Type-C Cable
• Receiver
  1x Type-A 2.4GHz Receiver

FCC Compliance Statement

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.

• 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.