Introduction
Welcome to your Newmen GM335 Mechanical Keyboard. This manual provides detailed instructions for the proper setup, operation, and maintenance of your keyboard to ensure optimal performance and longevity. Please read this guide thoroughly before using the product.

Image: The Newmen GM335 Mechanical Keyboard highlighting its key features including 104-key layout, wireless/wired connectivity, rainbow backlight, hot-swappable switches, no conflict keys, and compatibility with Windows/Mac.
Package Contents
Verify that all items are present in the package:
- 1 x Newmen GM335 Mechanical Keyboard
- 1 x USB-C Cable
- 1 x 2.4G Receiver
- 4 x Replaceable Switches (Red Switch)
- 1 x Switch Puller
- 1 x User Manual (this document)
Setup
Wired Connection
- Locate the USB-C port on the keyboard, typically on the top edge.
- Connect one end of the provided USB-C cable to the keyboard.
- Connect the other end of the USB-C cable to an available USB-A port on your computer.
- The keyboard will be recognized automatically by your operating system.

Image: The Newmen GM335 Mechanical Keyboard connected to a computer via its USB-C cable, illustrating the wired connection method.
Wireless Connection (2.4GHz)
- Locate the 2.4G wireless receiver (USB dongle) included in the package.
- Plug the 2.4G receiver into an available USB-A port on your computer.
- On the back of the keyboard, locate the mode switch. Slide the switch to the '2.4G' position.
- The keyboard should automatically connect to the receiver. If not, ensure the receiver is properly inserted and the keyboard is sufficiently charged.

Image: Illustration of the Newmen GM335 Mechanical Keyboard's dual connectivity, showing both USB-C wired and 2.4GHz wireless options for flexible use.
Operating Instructions
Keyboard Layout
The Newmen GM335 features a full 104-key layout, including a numeric keypad, dedicated arrow keys, and a full row of function keys (F1-F12). This layout is designed for both typing efficiency and gaming functionality.
- N-Key Rollover (NKRO): In wired mode, the keyboard supports N-key rollover, allowing all keys to be registered simultaneously.
- 6-Key Rollover (6KRO): In wireless mode, the keyboard supports 6-key rollover, allowing up to 6 keys to be registered simultaneously.

Image: Top-down view of the Newmen GM335 Mechanical Keyboard, illustrating its complete 104-key layout with separate arrow keys, numeric keypad, and function keys.
Backlight Control
The keyboard features a rainbow LED backlight with 14 pre-programmed effects. You can customize the lighting to suit your preferences.
- Turn On/Off Backlight: Press Fn + Esc.
- Switch Backlight Effect: Press Fn + Pause/PgUp to cycle through 14 different lighting modes.
- Adjust Backlight Speed: Press Fn + Left Arrow / Right Arrow.
- Adjust Backlight Brightness: Press Fn + Up Arrow / Down Arrow.

Image: Two Newmen GM335 Mechanical Keyboards demonstrating the vibrant rainbow LED backlight and its 14 adjustable effects.
Hot-Swappable Switches
The GM335 keyboard supports hot-swappable 3-pin mechanical switches, allowing you to easily change switches without soldering. This enables customization of your typing experience.
- Using the provided switch puller, carefully grip the switch you wish to remove.
- Gently pull the switch upwards until it detaches from the PCB.
- Align the pins of the new 3-pin switch with the holes on the PCB.
- Press the new switch firmly into place until it clicks. Ensure it is seated correctly and functions.

Image: Close-up view of the Newmen GM335 Mechanical Keyboard with keycaps and switches removed, demonstrating its hot-swappable design and compatibility with red, brown, or blue switches.
Compatibility
The Newmen GM335 Mechanical Keyboard is compatible with a wide range of operating systems and devices, including:
- Windows XP / 7 / 8 / 10
- Mac OS
- Compatible with Laptops, PCs, and Tablets.

Image: The Newmen GM335 Mechanical Keyboard integrated into a gaming setup, emphasizing its no-conflict keys for reliable and accurate input during gameplay on Mac and Windows systems.
Maintenance
Regular maintenance helps preserve the keyboard's functionality and appearance.
- Cleaning: Use a soft, dry cloth to wipe the keyboard surface. For deeper cleaning, remove keycaps using a keycap puller (not included) and use compressed air to clear debris.
- Switch Care: Avoid spilling liquids on the keyboard. If a switch feels inconsistent, consider replacing it with one of the spare switches provided.
- Storage: Store the keyboard in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.
Troubleshooting
If you encounter issues with your Newmen GM335 keyboard, refer to the following common solutions:
- Keyboard Not Responding (Wired): Ensure the USB-C cable is securely connected to both the keyboard and the computer. Try a different USB port or cable.
- Keyboard Not Responding (Wireless):
- Verify the 2.4G receiver is properly plugged into a USB port.
- Check that the mode switch on the back of the keyboard is set to '2.4G'.
- Ensure the keyboard battery is charged. Connect the USB-C cable to charge it.
- If the connection is lost, try re-pairing by pressing Fn + Right Ctrl (refer to the manual for specific pairing instructions if available, as this may vary).
- Backlight Not Working/Adjusting: Ensure the backlight is turned on (Fn + Esc). Try cycling through effects (Fn + Pause/PgUp) or adjusting brightness (Fn + Up/Down Arrow).
- Keys Not Registering: For individual keys, check if the switch is properly seated. If not, remove and re-insert the switch. If the issue persists, replace the switch with a spare.
- Keyboard Enters Sleep Mode Too Quickly: The keyboard has an automatic power-saving feature. This setting is typically fixed and cannot be adjusted by the user. Ensure the keyboard is charged or use it in wired mode if frequent disconnections due to sleep mode are disruptive.
Specifications
| Model | GM335 |
| Connectivity Technology | RF (2.4Ghz Wireless), USB-C (Wired) |
| Keyboard Description | Mechanical |
| Key Layout | 104-Key Full Size |
| Switch Type | Red Switch (Hot-Swappable 3-pin) |
| Backlight | Rainbow LED (14 effects) |
| Compatible Devices | Laptop, PC, Tablet |
| Operating System Support | Windows XP/7/8/10, Mac OS |
| Special Features | Backlit, Ergonomic, Rechargeable, Hot-Swappable |
| Item Weight | 2.7 pounds |
| Package Dimensions | 17.72 x 6.34 x 1.93 inches |
Warranty and Support
The Newmen GM335 Mechanical Keyboard comes with an 18-month warranty from the date of purchase. This warranty covers manufacturing defects and ensures quality assurance.
For any questions, technical support, or warranty claims, please contact Newmen customer service. Refer to the product packaging or the official Newmen website for specific contact details.