1. Introducción
The YUNZII B75 PRO is a 75% layout wireless mechanical keyboard designed for enhanced typing and gaming experiences. It features a gasket-mounted structure, hot-swappable switches, RGB backlighting, and versatile tri-mode connectivity. This manual provides essential information for setting up, operating, and maintaining your keyboard.
2. Contenido del paquete
Upon unboxing your YUNZII B75 PRO keyboard, please verify that all the following items are included:
- YUNZII B75 PRO Keyboard
- Cable USB tipo C
- Dongle inalámbrico 2.4G
- Switch Puller and Keycap Puller
- Teclas e interruptores adicionales
- Guardapolvo
- Function Card & User Manual (this document)

Image: Contents of the YUNZII B75 PRO keyboard package, including the keyboard, cables, tools, and extra accessories.
Video: An unboxing demonstration of the YUNZII B75 PRO Wireless Mechanical Keyboard, showcasing the package contents and initial setup.
3. Características del producto
3.1. Conectividad trimodo
The B75 PRO supports three connection modes for maximum versatility:
- Con cable (USB tipo C): Para una conexión estable y de baja latencia.
- 2.4 GHz inalámbrico: Utilizes the included USB dongle for a fast and reliable wireless experience.
- Bluetooth: Connects to multiple devices (up to 5) for seamless switching.

Image: Diagram illustrating the three connection modes (Bluetooth, 2.4GHz Wireless, USB-C Wired) and compatibility with various devices.
3.2. Gasket Mount Structure with 5-Layer Padding
The keyboard features an advanced gasket mount design with five layers of sound-dampening materials. This construction minimizes vibrations and provides a softer, more comfortable typing feel with reduced acoustic resonance.

Image: Diagram showing the five layers of sound-absorbing foams within the gasket mount structure.
3.3. Conmutadores intercambiables en caliente
The B75 PRO is equipped with full-key hot-swappable sockets, compatible with both 3-pin and 5-pin mechanical switches. This allows users to easily change switches without soldering, customizing the typing feel and sound to their preference. The keyboard comes with pre-lubed Cocoa Cream V2 linear switches for a smooth and consistent keystroke.

Image: Illustration demonstrating the hot-swappable nature of the keyboard, showing switches being removed and inserted.
3.4. Retroiluminación RGB
Experience vibrant illumination with 16.8 million colors and over 20 built-in backlight modes. The south-facing LEDs ensure optimal lighting for custom keycaps. Programmable software allows for extensive customization of lighting effects.

Image: The YUNZII B75 PRO keyboard displaying its vibrant RGB backlighting in a dynamic mode.
3.5. Perilla de control multimedia
A multi-function knob is integrated into the 75% layout, providing quick access to volume and RGB backlight adjustments. Long-pressing the knob switches between multimedia control and RGB mode, while rotating it adjusts the selected parameter.

Image: Diagram explaining the functionality of the rotary multi-media knob, showing how to switch between volume and RGB control.
3.6. Double Shot PBT Keycaps
The keyboard features durable double shot PBT keycaps with a Cherry profile, offering a superior touch and long-lasting legends that resist fading.

Imagen: Primer plano view of the double shot PBT keycaps, highlighting their texture and legends.
4. Configuración
4.1. Conexión del teclado
The YUNZII B75 PRO offers multiple connection options:
- Conexión por cable: Connect the USB Type-C cable from the keyboard to your computer's USB port. The keyboard will be automatically recognized.
- Conexión inalámbrica de 2.4 GHz: Insert the 2.4G USB dongle into your computer's USB port. Slide the switch on the back of the keyboard to the '2.4G' position. The keyboard should connect automatically.
- Conexión Bluetooth:
- Slide the switch on the back of the keyboard to the 'BT' position.
- En su dispositivo (PC, computadora portátil, tableta, teléfono), habilite Bluetooth y busque nuevos dispositivos.
- The keyboard will appear as 'YUNZII B75 PRO'. Select it to pair.
- Para cambiar entre dispositivos Bluetooth emparejados, presione FN + 1/2/3.
4.2. Ajuste de la altura del teclado
El teclado tiene dos teclastagy patas ajustables en la parte inferior, que le permiten configurar su ángulo de escritura preferido para una comodidad ergonómica.

Image: Close-up of the adjustable feet on the underside of the YUNZII B75 PRO keyboard.
5. Instrucciones de funcionamiento
5.1. Funciones del botón multimedia
- Girar: Adjusts volume (default) or RGB brightness/speed (when in RGB mode).
- Prensa breve: Mute/unmute volume (default) or change RGB effect (when in RGB mode).
- Pulsación larga (3 segundos): Switches between Multimedia Mode and RGB Mode.
5.2. Control de retroiluminación RGB
- FN + Fin: Cambia el color de la luz de fondo.
- FN + Insertar: Changes backlight effect.
- Knob (in RGB Mode): Rotate to adjust brightness/speed, short press to change effect.
5.3. FN Key Combinations (Windows/MacOS)
The keyboard supports various FN key combinations for quick access to system functions:
| Tecla de función | Acción |
|---|---|
| FN + F1 | Computadora abierta |
| FN + F2 | Abrir página de inicio |
| FN + F3 | Calculadora abierta |
| FN + F4 | Abrir jugador |
| FN + F5 | Canción anterior |
| FN + F6 | Próxima canción |
| FN + F7 | Reproducir/Pausa |
| FN + F8 | Detener |
| FN + F9 | Silenciar |
| FN + F10 | Bajar volumen |
| FN + F11 | Subir volumen |
| FN + F12 | Abrir correo |
| FN + A | Cambiar al modo Windows |
| FN+S | Switch to MacOS Mode |
| FN + GANAR | Lock/Unlock WIN Key |
| FN + Ctrl | Check Battery Level (Wireless Mode) |

Image: Visual guide to common FN key combinations for Windows functions.
5.4. Software programable
The YUNZII B75 PRO supports programmable software for Windows and MacOS. This software allows you to:
- Remap keys for personalized layouts.
- Create and edit macros for complex commands.
- Customize RGB lighting effects and animations.
Please refer to the official YUNZII webSitio para descarga de software e instrucciones detalladas.

Image: Screenshot of the programmable software interface for customizing key functions and RGB lighting.
6. Información de la batería
The keyboard is equipped with a 4000mAh high-capacity battery, providing extended usage times in wireless modes. The battery is rechargeable via the USB Type-C port.
- Cargando: Connect the keyboard to a power source using the USB Type-C cable. The spacebar will flash green while charging and remain solid green when fully charged.
- Indicador de batería baja: When the battery level is below 15%, the spacebar will flash red slowly.
- Comprobación del nivel de la batería: En modo inalámbrico, presione FN + Ctrl to display the current battery level via the number row LEDs.

Image: Visual representation of battery charging and level indicators on the keyboard.
7. Mantenimiento
7.1. Limpieza
Para mantener la apariencia y funcionalidad de su teclado:
- Use a soft, lint-free cloth to wipe the keycaps and frame.
- Para una limpieza más profunda, utilice el extractor de teclas provisto para quitar las teclas y limpiar debajo con aire comprimido o un cepillo pequeño.
- Evite utilizar productos químicos agresivos o materiales abrasivos.
7.2. Reemplazo de interruptores y teclas
El diseño intercambiable en caliente permite reemplazar fácilmente los interruptores y las teclas:
- Use the keycap puller to gently remove keycaps by hooking onto two sides and pulling upwards.
- Use the switch puller to remove switches by aligning the prongs with the clips on the top and bottom of the switch and gently squeezing while pulling upwards.
- To install new switches, align the pins with the holes on the PCB and press down firmly until the switch clicks into place. Ensure pins are not bent.
- To install new keycaps, align them with the switch stem and press down gently.
8. Solución de problemas
If you encounter issues with your YUNZII B75 PRO keyboard, refer to the following common solutions:
- Q1: Why is the keyboard's spacebar flashing red?
A: When the battery is lower than 15%, the spacebar will flash red slowly. When charging, the spacebar will stay green. After charging is complete, the spacebar will restore to its normal RGB mode. - Q2: The keyboard is not working or not charging.
A: Please download the latest firmware from the YUNZII website and update it. Ensure the software is not running in the background during the update. Try updating in wired mode. - Q3: The Windows key is not working.
A: Please try pressing FN + GANAR to unlock the Windows key. This should resolve the issue. - Q4: Connectivity issues (Bluetooth/2.4G).
A: Ensure the keyboard is in the correct mode (BT or 2.4G). For Bluetooth, try re-pairing the device. For 2.4G, ensure the dongle is securely inserted and try a different USB port. Ensure the keyboard is sufficiently charged.

Image: A visual troubleshooting guide addressing common issues like low battery, connectivity, and Windows key functionality.
9. Especificaciones
| Característica | Detalle |
|---|---|
| Modelo | B75 PRO |
| Disposición | 75% (82 teclas + 1 perilla) |
| Conectividad | Bluetooth, conexión inalámbrica de 2.4 GHz, cable USB tipo C |
| Interruptores | Cocoa Cream V2 (Pre-lubed Linear), Hot-swappable (3-pin/5-pin) |
| Teclas | Double Shot PBT, Cherry Profile |
| Iluminar desde el fondo | RGB (South-facing LEDs, 20+ modes, programmable) |
| Capacidad de la batería | 4000 mAh |
| Dispositivos compatibles | Laptop, PC, Smartphone, Gaming Consoles |
| Sistema operativo | Ventanas, Mac OS |
| Dimensiones | 12.7 x 5.64 x 1.58 pulgadas (aprox.) |
| Peso del artículo | 1.98 libras |
| Material | Plástico |
10. Garantía y soporte
For warranty information, technical support, or further assistance, please visit the official YUNZII webSitio web o contacte con el servicio de atención al cliente. Conserve el recibo de compra para reclamaciones de garantía.
Official YUNZII Websitio: www.yunzii.com