Keychron B4 Pro UltraSlim Mechanical Keyboard

The Keychron B4 Pro UltraSlim is a high-performance wireless mechanical keyboard designed for users who demand versatility, portability, and a premium typing experience. With its ultra-slim profile and 96% layout, this keyboard offers a compact yet comprehensive key arrangement, making it ideal for office professionals, productivity enthusiasts, and even gamers who value desk space without sacrificing essential keys. Its multi-mode connectivity, including Bluetooth, 2.4 GHz wireless, and wired options, ensures seamless integration with a wide range of devices and operating systems. The keyboard’s modern design and robust feature set make it a compelling choice for those who appreciate both aesthetics and functionality in their daily workflow.

Product Highlights

The standout feature of this keyboard is its ultra-slim design, which delivers a sleek and modern look while maintaining the tactile satisfaction of a mechanical keyboard. The 96% layout strikes a perfect balance between compactness and usability, offering nearly all the keys of a full-sized keyboard in a smaller footprint. This makes it especially suitable for users who need a numeric keypad but have limited desk space. The device supports three connectivity modes—Bluetooth, 2.4 GHz wireless, and wired USB—enabling users to switch effortlessly between multiple devices, such as laptops, desktops, tablets, and even smartphones. Its ANSI standard layout ensures familiarity and ease of use for a wide audience. The keyboard’s cross-platform compatibility and quick device-switching capabilities set it apart in a crowded market, making it an excellent choice for multitaskers and professionals who work across different systems.

• Ultra-slim profile for portability and style
• 96% layout with full function row and numeric keypad
• Multi-mode connectivity: Bluetooth, 2.4 GHz wireless, and wired
• ANSI standard layout for universal compatibility
• Optimized for productivity, gaming, and everyday use

Construction Details

The keyboard features a minimalist and contemporary design, with an ultra-slim chassis that complements any workspace. Its construction utilizes high-quality materials, combining a sturdy frame with premium keycaps that resist wear and fading. The 96% layout is carefully engineered to maximize efficiency, placing all essential keys within easy reach while reducing the overall footprint. The low-profile design not only enhances portability but also promotes a more ergonomic typing angle, reducing wrist strain during extended use. The build quality is robust, ensuring long-term durability even with daily heavy usage. The keyboard’s surface is finished with a smooth texture, and the key legends are crisp and easy to read, contributing to both aesthetics and practicality.

• Sturdy, ultra-slim chassis for durability and portability
• Premium keycaps with wear-resistant legends
• Compact 96% layout for efficient key placement
• Ergonomic low-profile design for comfortable typing
• Modern aesthetic suitable for any environment

Connectivity Options

This keyboard excels in connectivity, offering users maximum flexibility to suit any workflow. It supports three distinct connection modes: Bluetooth, 2.4 GHz wireless, and wired USB. The Bluetooth mode allows pairing with up to three devices simultaneously, making it easy to switch between a laptop, tablet, and smartphone with the press of a button. The 2.4 GHz wireless option ensures a stable, low-latency connection, which is particularly beneficial for gaming or tasks that require instant responsiveness. For those who prefer a traditional setup or need to charge while working, the wired USB mode provides uninterrupted performance. Switching between these modes is seamless, thanks to intuitive controls and clear indicators. The keyboard is compatible with multiple operating systems, including Windows, macOS, and Linux, making it a versatile addition to any tech setup. Charging is efficient, with a long-lasting battery that supports extended wireless use, minimizing downtime and keeping productivity high.

• Bluetooth connectivity for up to three devices
• 2.4 GHz wireless for stable, low-latency performance
• Wired USB mode for continuous use and charging
• Easy device switching with dedicated controls
• Cross-platform compatibility (Windows, macOS, Linux)
• Efficient battery with long-lasting wireless operation

Personalization Options

Personalization is at the heart of this keyboard’s design, offering users a range of options to tailor their typing experience. Key remapping is supported, allowing users to assign custom functions or macros to any key, which is especially useful for productivity workflows or gaming shortcuts. The keyboard is compatible with proprietary software that provides a user-friendly interface for configuring key assignments, creating macros, and adjusting settings. Aesthetic customization is also possible, with options for customizable backlighting that let users choose from various colors and effects to match their mood or workspace. The keycaps can be swapped out for different profiles or materials, enabling further personalization in both feel and appearance. These features empower users to create a keyboard setup that is uniquely their own, enhancing both functionality and style.

• Full key remapping for custom workflows
• Macro support for advanced productivity or gaming
• Customizable backlighting with multiple effects and colors
• Proprietary software for easy configuration
• Swappable keycaps for personalized aesthetics and feel
• Adjustable settings for typing preferences

Beyond Basics

In addition to its core features, the keyboard includes thoughtful extras that enhance the user experience. Dedicated media controls allow for quick access to volume, playback, and other essential functions without interrupting workflow. The compact layout incorporates a full function row and numeric keypad, providing all the tools needed for productivity in a streamlined form factor. Unique design elements, such as subtle indicator lights and a refined finish, add to its premium appeal. These additional features make the keyboard not just a tool, but an integral part of a modern, efficient workspace.

• Dedicated media controls for convenience
• Integrated function row and numeric keypad
• Subtle indicator lights for status updates
• Refined design details for a premium look and feel