1. Introduction
The Ajazz AK820 Pro is a 75% compact mechanical keyboard designed for both enthusiasts and professionals. It features a gasket-mounted design, triple connectivity (Bluetooth 5.1, 2.4GHz wireless, and USB-C wired), a versatile 0.85-inch TFT screen, hot-swappable switches, and full RGB backlighting. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your keyboard.

2. Package Contents
Please check the package for the following items:
- 1x Ajazz AK820 Pro Mechanical Keyboard
- 3x Extra Keycaps
- 1x 2-in-1 Switch-and-Keycap Puller
- 1x USB A-to-C Cable
- 1x Wireless 2.4GHz Receiver (stored on the keyboard)
- 1x User Manual


3. Setup
3.1 Physical Setup
The keyboard features adjustable angles for ergonomic comfort. Locate the kickstands on the underside of the keyboard and flip them out to your preferred typing angle.


3.2 Connectivity
The Ajazz AK820 Pro supports three connection modes: USB-C Wired, 2.4GHz Wireless, and Bluetooth 5.1.

- Wired Mode: Connect the keyboard to your computer using the provided USB A-to-C cable. The keyboard will automatically switch to wired mode.
- 2.4GHz Wireless Mode:
- Locate the 2.4GHz receiver, usually stored in a compartment on the underside of the keyboard.
- Plug the receiver into an available USB port on your computer.
- Switch the mode selector on the keyboard to 2.4G wireless mode (refer to the switch on the back of the keyboard, often labeled 'BT USB 2.4G').
- Press
FN + Rto activate 2.4GHz mode. The keyboard should connect automatically.
- Bluetooth Mode:
- Switch the mode selector on the keyboard to Bluetooth mode (refer to the switch on the back of the keyboard, often labeled 'BT USB 2.4G').
- Press
FN + Q,FN + W, orFN + Eto select one of three Bluetooth channels. The indicator light for the selected channel will blink, indicating pairing mode. - On your device (computer, laptop, tablet, or phone), search for Bluetooth devices and select "Ajazz AK820 Pro" to pair.
- Once paired, the indicator light will stop blinking and remain solid.

4. Operating Instructions
4.1 TFT Screen Functions
The 0.85-inch TFT screen provides real-time information and customization options:
- Custom Image: Upload custom images via the driver software.
- Date/Time: Displays current date and time.
- Battery Level: Shows the keyboard's battery status.
- Connection Method: Indicates the active connection mode (Wired, 2.4GHz, Bluetooth).
- OS Display: Shows whether the keyboard is in Mac or Windows mode.
- Backlight Effects: Adjust and preview backlight settings.
- Volume Adjustment: Control audio volume.
- Language Switch: Switch between different display languages (e.g., FN+C/V).


4.2 Multi-Function Knob
The knob located on the top right of the keyboard provides quick access to several functions:
- Volume Control: Rotate to adjust volume (Volume+/-), press to Mute.
- Brightness/Speed: Configure backlight brightness or effect speed.
- Effect/Colour: Configure backlight effect or color.
- Language Switching: Switch between display languages on the TFT screen.

4.3 Backlight Settings
Adjust the RGB backlight using the following FN key combinations:
FN + ↑: Increase Backlight BrightnessFN + ↓: Decrease Backlight BrightnessFN + \: Switch Backlight EffectFN + X: Turn On/Off BacklightFN + SPACE BAR: Reset the Keyboard to default settings

4.4 Mac/Win Compatibility
The keyboard is fully compatible with both Mac and Windows operating systems. Use the dedicated switch on the underside of the keyboard to toggle between modes. The TFT screen will also indicate the active OS mode.

4.5 Programmable Software
The Ajazz AK820 Pro supports programmable software for advanced customization of key assignments, macros, and lighting effects. Please download the official driver software from the Ajazz website for full functionality.
5. Maintenance
5.1 Cleaning
To clean your keyboard, first disconnect it from your computer. Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution. For keycaps, you can remove them using the provided keycap puller and clean them separately. Avoid spraying liquids directly onto the keyboard.
5.2 Switch and Keycap Replacement
The Ajazz AK820 Pro features hot-swappable sockets, allowing you to easily change switches without soldering. Use the provided 2-in-1 switch-and-keycap puller for replacement.
- Removing Keycaps: Gently hook the keycap puller onto the sides of the keycap and pull upwards.
- Removing Switches: Use the switch puller end to grip the top and bottom clips of the switch, then pull straight up.
- Installing Switches: Align the pins of the new switch with the holes on the PCB. Press down firmly until the switch clicks into place. Ensure pins are not bent.
- Installing Keycaps: Place the keycap over the switch stem and press down gently until it is secure.

6. Troubleshooting
- Keyboard not responding: Ensure the keyboard is properly connected (wired) or paired (wireless/Bluetooth). Check battery level. Try resetting the keyboard (
FN + SPACE BAR). - Wireless connectivity issues: Ensure the 2.4GHz receiver is securely plugged in or Bluetooth is enabled on your device. Try re-pairing the device.
- Backlight not working: Check backlight brightness settings (
FN + ↑/↓) and ensure it's not turned off (FN + X). - Keys not registering: If specific keys are not working, try removing and re-inserting the switch for that key, as it might not be seated correctly.
7. User Tips
- For optimal battery life, turn off RGB lighting when not needed or use wired mode.
- Experiment with different backlight effects and colors to personalize your setup.
- Utilize the programmable software to create custom keybinds and macros for enhanced productivity or gaming.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | EPOMAKER X AJAZZ |
| Model | AK820 PRO |
| Layout | 75% ANSI US Layout |
| Key Amounts | 81 keys, 1 Metal Knob and 1 Glass Screen |
| Screen Size | 0.85 inch |
| Keycaps Material | PBT Plastic |
| Keycaps Profile | OEM |
| Keycaps Manufacturing Technique | Double-Shot |
| Hotswappable | Yes, with 3/5-pin Mechanical Switches |
| Connectivity | Type-C Wired, Bluetooth 5.1 & 2.4GHz |
| Mounting Type | Gasket |
| Stabilizer Type | Plate-mounted |
| Case Material | ABS Plastic |
| Plate Material | PC Plate |
| Flex-Cut | Yes, both PCB and PC plate have flex-cut |
| PCB Thickness | 1.2mm |
| NKRO | Support |
| Backlight | 1.6M RGB |
| Battery Capacity | 4000mAh |
| Polling Rate | 1kHz in wired and 2.4GHz mode, 125Hz in Bluetooth mode |
| Compatible OS | Windows/MacOS |
| Dimension | 327*136*40mm |
| Weight | 0.8kg |
8.1 Switch Specifications
| Feature | Ajazz Gift Switch | Ajazz Flying Fish Switch |
|---|---|---|
| Type | 5-pin Linear, Factory Lubed | 5-pin Linear, Factory Lubed |
| Total Travel | 3.6 ± 0.2mm | 3.5 ± 0.4mm |
| Pre Travel | 2.0 ± 0.4mm | 2.0 ± 0.4mm |
| Initial Force | 45 ± 8g | 42 ± 10g |
| Bottom Force | 60 ± 8g | 48 ± 10g |


9. Support
For further assistance, technical support, or warranty information, please refer to the official Ajazz website or contact their customer service. Keep your purchase receipt for any warranty claims.