1. Introducció
Welcome to the YUNZII B87 Wireless Mechanical Keyboard user manual. This guide provides detailed instructions to help you set up, operate, and maintain your new keyboard. The YUNZII B87 is an 87-key TKL layout mechanical keyboard featuring tri-mode connectivity, QMK/VIA programmability, hot-swappable switches, gasket mount design, and RGB backlighting.

Figure 1: YUNZII B87 Wireless Mechanical Keyboard with included wrist rest.
2. Producte acabatview
Característiques clau
- 87-Key TKL Layout: Space-saving design with full functionality.
- Connectivitat trimodal: Admet connexions Bluetooth, sense fil 2.4G i amb cable USB-C.
- QMK/VIA Programmable: Customize key mappings, macros, and lighting effects via web navegador.
- Sòcols intercanviables en calent: Compatible with 3-pin and 5-pin mechanical switches.
- Disseny de muntatge de junta: Enhanced typing feel and reduced noise with 5-layer padding.
- Retroil·luminació RGB: Multiple customizable RGB effects with south-facing LEDs.
- Bateria de 4000 mAh: Extended wireless usage.
- Dye Sublimation PBT Keycaps: Durable, skin-friendly, and bear-patterned.
- Soft-Touch Wrist Rest: Complimentary wrist rest for ergonomic comfort.

Figura 2: Mésview of YUNZII B87 key features including 80% layout, PBT keycaps, tri-mode connectivity, RGB, hot swap, gasket structure, 4000mAh battery, and QMK/VIA programmability.
Components
The YUNZII B87 keyboard includes the following components:
- Teclat mecànic sense fil YUNZII B87
- Soft-Touch Wrist Rest
- Cable USB-C a USB-A
- 2.4GHz Wireless Dongle (stored in the keyboard)
- Extractor de tecles
- Tirador de commutació
- Tecles i interruptors addicionals

Figura 3: Explotat view illustrating the 5-layer gasket mount structure of the YUNZII B87 keyboard.
3. Configuració
Modes de connectivitat
The YUNZII B87 supports three connection modes: Bluetooth, 2.4G Wireless, and USB-C Wired. A switch on the side of the keyboard allows you to select your preferred mode.

Figure 4: Diagram illustrating the three connectivity modes: Bluetooth, 2.4GHz Wireless, and USB-C Wired.
Bluetooth Connection (Fn+1/2/3)
- Toggle the switch on the side of the keyboard to the BT Bluetooth Mode.
- Premsa curta Fn+1/2/3 to choose a Bluetooth channel. The 1/2/3 key will flash blue slowly.
- On your device (PC, laptop, smartphone), go to Bluetooth settings and select "YUNZII B87 BT1/BT2/BT3" for pairing.
- Once paired successfully, the RGB backlights will restore to the normal mode.
Note: If pairing fails, the 1/2/3 key will flash slowly. Please reconnect it. If there is no operation for 60 seconds, the 1/2/3 key will turn off. Please awaken the keyboard first if you need to reconnect it.

Figure 5: Step-by-step guide for Bluetooth connection.
2.4G Wireless Connection (Fn+4)
- Switch the mode button to the 2.4G position. The keyboard enters 2.4G Wireless Mode.
- Premsa llarga Fn + 4 to enter 2.4G wireless pairing mode. The 4 key will flash green fast.
- Plug the 2.4G dongle into an empty USB port on your device.
- After successful pairing, the lighting mode will restore to normal.
Note: If pairing fails, the 4 key will flash slowly. Please reconnect it. If there is no operation for 60 seconds, the 4 key will turn off. Please awaken the keyboard first if you need to reconnect it.

Figure 6: Step-by-step guide for 2.4G Wireless connection.
Connexió per cable USB-C
Connect the keyboard to your device using the provided USB-C to USB-A cable. The keyboard will automatically switch to wired mode.
Compatibilitat amb diversos dispositius
The YUNZII B87 is compatible with Windows, macOS, Linux, iOS, and Android devices. It can connect to up to 5 devices simultaneously (3 via Bluetooth, 1 via 2.4G, 1 via USB-C), allowing seamless switching between them.

Figure 7: The YUNZII B87 supports multiple devices including PC, Laptop, Tablet, Phone, Switch, and Xbox.
4. Instruccions de funcionament
Control de retroiluminació RGB
Customize your typing experience with various RGB backlight settings:
- Fn + Retrocés: Turn backlight effect ON/OFF.
- Fn + ↑: Augmenta la brillantor de la retroiluminació.
- Fn + ↓: Reduir la brillantor de la retroiluminació.
- Fn + →: Change backlight effect.
- Fn + ←: Change backlight effect.
- Fn + Intro: Canvia el color de la llum de fons.
- Fn + [ : Increase blinking speed.
- Fn + ] : Decrease blinking speed.

Figure 8: Shortcuts for controlling RGB backlight effects, brightness, speed, and color.
Personalització de QMK/VIA
The YUNZII B87 supports QMK/VIA software, allowing extensive customization of your keyboard directly from a web browser. This includes:
- Key Mappings: Reassign any key function.
- Multiple Layers: Create different key layouts for various tasks.
- Macros: Program complex sequences of commands.
- Efectes d'il·luminació: Fine-tune RGB patterns and colors.
- Phrase Typing: Assign common phrases to single keys.

Figure 9: The YUNZII B87 supports QMK/VIA for advanced customization.
Interruptors intercanviables en calent
The keyboard features full-key hot-swappable sockets, allowing you to easily change switches without soldering. This supports both 3-pin and 5-pin switches.
Replacing Switches and Keycaps
- Feu servir l'extractor de tecles proporcionat per treure suaument la tecla desitjada.
- Use the provided switch puller to carefully grip the switch and pull it straight up.
- Align the pins of the new switch with the holes on the PCB and gently push down until it clicks into place.
- Torneu a col·locar la tapa de les tecles al nou interruptor.

Figure 10: The YUNZII B87 features hot-swappable sockets and south-facing LEDs.
Comprovació de l’estat de la bateria
Premeu Fn + Ctrl dreta to check the battery level. The power indicator will show:
- 1-30%: Vermell
- 31-70%: groc
- 71% o més: Verd

Figure 11: Battery level indicators for the 4000mAh battery.
5. Manteniment
To ensure the longevity and optimal performance of your YUNZII B87 keyboard, follow these maintenance tips:
- Neteja regular: Use a soft brush or compressed air to remove dust and debris from between the keycaps. For deeper cleaning, remove keycaps using the provided puller and wipe the keyboard surface with a damp, drap sense pelusa.
- Cura de les tecles: The Dye Sublimation PBT keycaps are durable. Avoid using harsh chemicals or abrasive materials that could damage the legends or surface.
- Cura del canvi: While switches are hot-swappable, avoid excessive force when removing or inserting them to prevent bending pins or damaging sockets.
- Longevitat de la bateria: For optimal battery life, avoid fully discharging the keyboard frequently. Charge it when the indicator shows low battery.
- Emmagatzematge: When not in use, store the keyboard in a clean, dry place away from direct sunlight and extreme temperatures.
6. Especificacions
| Característica | Detall |
|---|---|
| Disseny | 87 Keys (TKL) |
| Connectivitat | Bluetooth, sense fil de 2.4 GHz, USB-C amb cable |
| Capacitat de la bateria | 4000 mAh |
| Interruptors | Hot-swappable (3-pin & 5-pin compatible) |
| Taps de claus | Dye Sublimation PBT |
| Llum de fons | RGB (South-facing LED) |
| Programació | Suport QMK/VIA |
| Sistema operatiu compatible | Windows, macOS, Linux, iOS, Android |
| Material | Acrilonitril butadiè estirè (ABS) |
| Pes de l'article | 4.11 lliures |
| Dimensions del paquet | 16.22 x 7.76 x 3.19 polzades |
7. Solució De Problemes
- Problemes de connectivitat: If the keyboard fails to connect via Bluetooth or 2.4G, ensure the mode switch is in the correct position. Try re-pairing the device. If the keyboard goes idle, press any key to wake it up before attempting to reconnect.
- QMK/VIA Not Responding: Assegureu-vos el vostre web browser is compatible and the keyboard is in wired mode for initial setup or firmware updates. Refer to the official YUNZII QMK/VIA guide for detailed instructions.
- RGB Backlight Not Working: Check the battery level. Ensure the backlight is not turned off (Fn + Backspace). Cycle through effects and brightness settings using the Fn key combinations.
- Claus que no es registren: If a specific key is not working, try hot-swapping the switch with a known working one or one of the spare switches provided. Ensure the switch pins are not bent during insertion.
8. Garantia i Suport
For warranty information, technical support, or any questions regarding your YUNZII B87 keyboard, please visit the official YUNZII store or contact their customer support team.
Podeu visitar el YUNZII Store on Amazon per a més informació.
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