Description
The Keychron B3 Pro Ultra-Slim Wireless Keyboard is a sleek and lightweight 75% keyboard designed for users who value portability, versatility, and a clean workspace. With support for 2.4 GHz wireless, Bluetooth 5.2, and wired Type-C connectivity, it seamlessly connects to smartphones, tablets, PCs, Macs, and Linux devices, making it ideal for home, office, or travel use. The 2.4 GHz mode delivers a fast 1000 Hz polling rate for responsive performance, while Bluetooth allows easy switching between multiple devices for smooth multitasking.
Built with an ultra-thin profile of just 9.2 mm at the front, the B3 Pro offers a comfortable 2.8° typing angle that reduces fatigue during long typing sessions. Despite its slim design, it houses an 800mAh rechargeable battery that provides up to 300 hours of continuous use, ensuring long-lasting productivity without frequent charging.
The keyboard is fully customizable through the Keychron Launcher web app, enabling key remapping, macros, and shortcuts across all major operating systems without installing software. Thoughtful extras like a plug-and-play 2.4 GHz receiver with onboard storage and a protective silicone skin make the Keychron B3 Pro a practical, durable, and modern ultra-slim keyboard solution.
Specification
- Layout: 75% (ANSI)
- Number of Keys: 79
- Multimedia Keys: 12
- Body Material: ABS
- Keycap Material: ABS
- Backlight: Non-backlit
- NKRO Support: No
Connectivity
- Wireless Modes: 2.4 GHz / Bluetooth / Wired
- Bluetooth Version: 5.2
- Bluetooth Device Name: Keychron B3 Pro
- Polling Rate: 1000 Hz (2.4 GHz & Wired), 90 Hz (Bluetooth)
Battery & Power
- Battery Capacity: 800 mAh rechargeable Li-polymer
- Wireless Working Time: Up to 300 hours
- Charging Time: Approx. 2.5 hours
- Charging Port: USB Type-C
Compatibility
- Operating Systems: macOS / Windows / Linux
Physical Specifications
- Dimensions: 296.8 × 127.5 mm (11.69 × 5.02 in)
- Weight: 410 g (0.90 lbs)
- Height (Front): 9.2 mm (0.36 in)
- Height (Rear): 14.9 mm (0.59 in)
- Typing Angle: 2.8°
Hardware
- MCU: TLSR8258
- Operating Temperature: -10°C to 50°C
Color Options
- Space Gray
- Ivory White
Included in the Box
- Keyboard
- USB Type-C Cable
- Type-A to Type-C Adapter
- 2.4 GHz Type-A Receiver
- Silicone Protective Skin
Ultra-Slim and Lightweight 75% Design
The Keychron B3 Pro is built with an ultra-slim and compact 75% layout that strikes a perfect balance between functionality and portability. With a thickness of just 9.2 mm at the front and a lightweight 410 g body, it is easy to carry and fits effortlessly into modern, minimalist workspaces. The reduced layout keeps all essential keys while saving desk space, making it ideal for users who want a clean setup without sacrificing productivity. Its solid ABS construction ensures durability despite its slim profile.
Triple-Mode Wireless and Wired Connectivity
Designed for maximum flexibility, the B3 Pro supports 2.4 GHz wireless, Bluetooth 5.2, and wired Type-C connections. The 2.4 GHz mode delivers a fast and stable 1000 Hz polling rate, offering near-wired responsiveness for everyday work and fast typing. Bluetooth 5.2 allows seamless switching between multiple devices, making multitasking smooth across phones, tablets, laptops, and desktops. The wired mode ensures uninterrupted use while charging, giving users complete control over how they connect.
Long-Lasting Battery Performance
Equipped with an 800 mAh rechargeable battery, the Keychron B3 Pro is built for extended usage without constant recharging. Thanks to intelligent power management and efficient wireless technology, it can provide up to 300 hours of continuous use on a single charge. This makes it especially suitable for office professionals, students, and travelers who need reliable performance throughout long work sessions. Charging is quick and convenient via the USB Type-C port, taking around 2.5 hours to fully recharge.
Web-Based Keychron Launcher Customization
The B3 Pro supports advanced customization through the Keychron Launcher web app, offering powerful configuration without the need to install any software. Users can easily remap keys, create macros, assign shortcuts, and customize layouts for different workflows. As a browser-based tool, it works across Windows, macOS, Linux, and other platforms using Chrome, Edge, or Opera. This ensures consistent access to customization features whether you are at home, in the office, or on the go.
Optimized Layout for macOS and Windows
Designed with a Mac-style layout, the Keychron B3 Pro provides the same multimedia and function key experience found on Apple keyboards, while remaining fully compatible with Windows systems. Users can switch between macOS and Windows layouts using software settings without changing keycaps. This dual-system support makes the keyboard ideal for users who work across multiple operating systems, ensuring familiarity, efficiency, and ease of use regardless of the device.
Ergonomic Typing Comfort
Despite its slim design, the B3 Pro is engineered for comfortable long-term typing. The integrated body offers a stable structure with a 2.8-degree typing angle that reduces wrist strain and fatigue during extended sessions. The low-profile keys provide smooth and consistent keystrokes, enhancing accuracy and speed. This thoughtful ergonomic design makes the keyboard suitable for prolonged work, study, or daily typing tasks.
Practical Accessories and Protective Design
The Keychron B3 Pro includes several practical accessories that enhance everyday usability. A plug-and-play 2.4 GHz Type-A receiver ensures quick wireless setup and can be safely stored in the dedicated slot on the keyboard. Additionally, the included silicone protective skin fits each key precisely, shielding the keyboard from dust, spills, and wear. Washable and reusable, it helps maintain the keyboard’s clean appearance while extending its lifespan.
