Einführung
Thank you for choosing the RedThunder K75 Wireless Mechanical Keyboard. This manual provides detailed instructions for setting up, operating, and maintaining your keyboard. Please read this manual thoroughly to ensure proper use and to maximize your experience with the K75 keyboard.

Bild: Überview of the RedThunder K75 Mechanical Keyboard highlighting its main features.
Lieferumfang
Überprüfen Sie, ob alle Artikel im Paket vorhanden sind:
- K75 Tastatur
- USB-Kabel
- Ersatzschalter (4 Stück)
- Bedienungsanleitung
- Tastenkappenabzieher
- 2.4G Dongle

Image: All components included in the RedThunder K75 package.
Aufstellen
Konnektivitätsmodi
The RedThunder K75 supports three connection modes: USB-C Wired, 2.4GHz Wireless, and Bluetooth (BT). Ensure the system switch (Win/Mac) and connection mode switch are in the correct positions before use.
- USB-C-Kabelanschluss: Connect the keyboard to your device using the provided USB-C data cable.
- 2.4 GHz Wireless: Insert the 2.4G dongle into your device's USB port. The keyboard will connect automatically.
- Bluetooth (BT): Drücken FN+Q/W/E to switch between BT1, BT2, or BT3 devices.

Image: Illustration of the three multi-device connection modes available on the K75 keyboard.
Treiberinstallation (nur Windows)
To access comprehensive programmability and customization options, download and install the K75-US driver. This software is compatible with Windows operating systems and functions when the keyboard is connected via 2.4G wireless or wired mode.
Steps for Driver Download:
- Ensure the system switch on the keyboard is set to "Win".
- Connect the keyboard to your Windows PC using the original USB-C data cable.
- Visit the official RedThunder website or use the provided short link (if available in your product documentation) to download the K75-US driver.
- Befolgen Sie die Anweisungen auf dem Bildschirm, um die Installation abzuschließen.
Video: Instructions on how to download and install the K75 driver for Windows.
Bedienungsanleitung
Multi-function CNC Knob
The CNC knob provides versatile control for both gaming and office modes:
- Modi wechseln: Durch langes Drücken des Drehknopfs für etwa 5 Sekunden kann zwischen Gaming-Modus und Büro-Modus umgeschaltet werden.
- Spielmodus: Rotate the knob to adjust backlight brightness. Click the knob to cycle through lighting effects.
- Office-Modus: Drehen Sie den Knopf, um die Systemlautstärke anzupassen. Klicken Sie auf den Knopf, um die Wiedergabe zu starten oder zu pausieren.

Image: Detailed functions of the CNC knob and indicator lights.
RGB-Hintergrundbeleuchtungssteuerung
The K75 keyboard features full RGB backlighting with 1.68 million colors. Adjust lighting effects using FN key combinations or the dedicated software.
- Helligkeit der Hintergrundbeleuchtung anpassen: Drücken FN + ↑ / ↓.
- Geschwindigkeit der Hintergrundbeleuchtung anpassen: Drücken FN + ← / →.
- Switch Side Lighting Modes: Drücken FN + TAB.
- Hintergrundbeleuchtungsmodus wechseln: Drücken FN + \|.
- Farbe der Hintergrundbeleuchtung wechseln: Drücken FN + PU.
- Self-set Game Lighting: Drücken FN+PD once to activate, press twice to start customized game lighting.

Image: The K75 keyboard displaying its vibrant RGB lighting.
Hot-Swap-fähige Schalter
The K75 features a hot-swappable PCB, allowing you to easily replace 3-pin or 5-pin mechanical switches without soldering. This enables customization of your typing feel.
- Use the included keycap puller to remove keycaps.
- Use the included switch puller to carefully remove the switch.
- Richten Sie die Stifte des neuen Schalters an den Buchsen auf der Leiterplatte aus und drücken Sie ihn fest, bis er einrastet.
- Tauschen Sie die Tastenkappe aus.

Image: Hot-swappable switches and components of the K75 keyboard.
Batterieinformationen
The keyboard is equipped with a rechargeable 4000mAh lithium-ion battery. A charging indicator light shows the power status:
- Schwache Batterie: Blinkt rot.
- Laden: Stays red.
- Vollständig aufgeladen: Green/Off.
For optimal charging, use the original charging cable or a qualified data-capable cable connected to a computer's USB port (DC: 5V).

Image: Battery capacity and estimated usage times for the K75 keyboard.
Programmierbare Software
The K75-US driver software (Windows only, 2.4G wireless or wired mode) allows for extensive customization:
- Tastenbelegung: Reassign keys to suit your workflow.
- Makrodefinition: Komplexe Befehlssequenzen erstellen.
- Hintergrundbeleuchtungseffekte: Adjust RGB lighting, including music rhythm backlights.
- Sensitivity & Debounce: Fine-tune keyboard response.
- Schlafenszeit: Konfigurieren Sie Energiespareinstellungen.

Image: The K75 programmable software interface for customization.
Video: Demonstration of the RedThunder K75 Gaming Keyboard's features and lighting.
Wartung
Reinigung
Regular cleaning helps maintain keyboard performance and appearance:
- Vor der Reinigung die Tastatur von allen Stromquellen trennen.
- Mit einem weichen, fusselfreien Tuch leichtampAnschließend mit Wasser oder einer milden Reinigungslösung abwischen, um die Tastenkappen und das Gehäuse zu reinigen.
- Für Staub und Schmutz zwischen den Tasten verwenden Sie Druckluft oder eine kleine Bürste.
- Vermeiden Sie die Verwendung aggressiver Chemikalien oder Scheuermittel.
Austausch des Schalters
As the K75 is hot-swappable, switches can be replaced if they become faulty or if you wish to change the typing feel. Refer to the "Hot-Swappable Switches" section for detailed instructions.
Fehlerbehebung
If you encounter issues with your RedThunder K75 keyboard, please refer to the following common solutions:
- Verbindungsprobleme: Ensure the keyboard is fully charged. Check that the system switch (Win/Mac) and connection mode switch (Wired/2.4G/BT) are correctly set. For Bluetooth, ensure your device's Bluetooth is enabled and the keyboard is paired.
- Tasten reagieren nicht: Try reconnecting the keyboard. If using wireless, ensure the dongle is properly inserted or Bluetooth is paired. If a specific key is not working, consider replacing the switch as the keyboard is hot-swappable.
- Probleme mit der Hintergrundbeleuchtung: Überprüfen Sie die Einstellungen für die Hintergrundbeleuchtung mit FN +. Ensure the keyboard is not in a mode where backlighting is disabled. If using the software, verify settings there.
- Software erkennt Tastatur nicht: Ensure the keyboard is connected via USB-C wired or 2.4G wireless mode and the system switch is set to "Win". Restart the software and/or your computer.
- Akku lädt nicht: Use the original USB-C cable and connect to a reliable power source, preferably a computer's USB port. Check the charging indicator light.
If problems persist, please contact RedThunder customer support for further assistance.
Technische Daten
| Modellnummer | K75 |
| Marke | Roter Donner |
| Maße | 14 x 7 x 1.9 Zoll (35.56 x 17.78 x 4.83 cm) |
| Artikelgewicht | 1.98 Pfund (0.9 kg) |
| Konnektivität | 2.4-GHz-Funk, Bluetooth, USB-C |
| Batterie | 4000 mAh Lithium-Ionen-Akku (im Lieferumfang enthalten) |
| Schalter | Hot-Swappable (3-pin/5-pin compatible) |
| Hintergrundbeleuchtung | Volles RGB |
| Tastenkappen | Dual-color PBT |
| Besondere Merkmale | CNC Knob, Programmable Keys, Gasket Structure, Two-stage Fußstütze |
Garantie und Support
For warranty information or technical support, please refer to the documentation included with your product or visit the official RedThunder website. You may also contact RedThunder customer service directly for assistance with product issues or inquiries.