surmen M75 75% Wireless Creamy Keyboard User Manual

1. Introduction

Thank you for choosing the surmen M75 75% Wireless Creamy Keyboard. This mechanical gaming keyboard features a compact 75% layout, gasket-mounted design, pre-lubed switches, and triple-mode connectivity (Bluetooth 5.0, 2.4Ghz wireless, and USB-C wired). It is designed to provide a superior typing and gaming experience with pleasing acoustic feedback and extensive customization options.

This manual provides detailed instructions on how to set up, operate, maintain, and troubleshoot your keyboard to ensure optimal performance.

The surmen M75 75% Wireless Creamy Keyboard in Shadow Red, showcasing its compact layout and vibrant RGB backlighting.

2. Setup

2.1. Package Contents

Before you begin, please ensure all items are present in the package:

• surmen M75 75% Wireless Creamy Keyboard
• Keycap Puller
• USB Cable (USB-A to USB-C)
• Additional Keycaps (if included with your specific model)
• Replacement Switches (if included)

2.2. Connection Modes

The surmen M75 keyboard supports three connection modes: Wired (USB-C), 2.4Ghz Wireless, and Bluetooth 5.0. A switch on the back of the keyboard allows you to select your preferred mode.

Illustration of the keyboard's triple-mode connectivity, including Bluetooth, 2.4Ghz wireless, and USB-C wired options.

• Wired Mode: Connect the keyboard to your computer using the provided USB-C cable. The keyboard will automatically be recognized.
• 2.4Ghz Wireless Mode: Locate the 2.4Ghz USB dongle, usually stored in a slot on the back of the keyboard. Plug the dongle into an available USB port on your computer. Switch the keyboard to 2.4G mode.
• Bluetooth Mode: Switch the keyboard to BT mode. The keyboard can connect to up to 3 Bluetooth devices simultaneously. To pair, press and hold Fn + Q, Fn + W, or Fn + E for 3-5 seconds until the corresponding indicator light flashes, indicating pairing mode. Select 'surmen M75' from your device's Bluetooth settings.

2.3. Initial Charge

For optimal performance, it is recommended to fully charge the keyboard before first use. Connect the keyboard via USB-C cable to a powered USB port. The keyboard features a 5000mAh battery for extended use.

The keyboard features a battery reminder function. Press Fn + Alt to check the current battery level in wireless mode.

3. Operating the Keyboard

3.1. Key Features

The surmen M75 keyboard is equipped with several advanced features:

• Noise Dampening: Features a gasket-mounted design with a 5-layer padding system (silicone pad, sound-absorbing sponge, IXPE switch pad, Poron foam, PET sound enhancement pad) to significantly reduce cavity sound and provide a pure switch sound.


An exploded view illustrating the five layers of sound-dampening material within the gasket-mounted keyboard structure.

Play video

Video demonstrating the sound-dampening capabilities of the SURMEN M75 Gasket Mounted Keyboard with its 5-layer padding system.

Play video

A sound test video showcasing the 'thocked' acoustic feedback of the SURMEN M75 keyboard.

• Hot-Swappable Switches: Compatible with most 3-pin and 5-pin mechanical switches, allowing for easy customization without soldering.
Play video

Video demonstrating the hot-swappable feature and south-facing LEDs of the keyboard.

• Double Shot PBT Keycaps: Durable keycaps with a Cherry profile for a comfortable typing experience.
Play video

Video showcasing the double shot PBT keycaps on the SURMEN M75 Wireless keyboard.

3.2. RGB Lighting Customization

The keyboard features 16 unique RGB light effects and supports over 16.8 million RGB colors customizable through the driver software. It also includes unique music rhythm RGB light effects that synchronize with audio.

Close-up view of the south-facing RGB LEDs, designed for better backlight illumination from the typist's perspective.

Screenshot of the professional software interface for driver macro customization, showing options for RGB lighting and key remapping.

To switch side light modes, use the shortcut Fn + Right Ctrl.

3.3. Multimedia Keys and Knob Functionality

The keyboard features a multi-function knob and dedicated multimedia keys for Windows and Mac operating systems. Ensure the correct OS switch (Win/Mac) on the back of the keyboard is selected.

Note: Win/Alt will interchange when switching interfaces; do not lock Win.

The knob controls brightness/volume. Press the knob to switch between RGB mode and Mute ON/OFF. Hold the knob for 3 seconds to change its mode to multimedia control (volume up/down, mute).

4. Maintenance

4.1. Cleaning

To maintain the keyboard's appearance and functionality, regularly clean it. Use a soft, lint-free cloth to wipe the surface. For deeper cleaning, you may use a can of compressed air to remove dust and debris from between the keycaps. For stubborn stains, a slightly damp cloth with mild soap can be used, ensuring no liquid enters the keyboard.

4.2. Switch and Keycap Replacement

Thanks to the hot-swappable design, you can easily replace switches and keycaps. Use the provided keycap puller to gently remove keycaps. For switches, use the switch puller to carefully extract them from the PCB. Align the new switch's pins with the sockets and press firmly until it clicks into place. Ensure pins are not bent during insertion.

5. Troubleshooting

• Keyboard not responding:
  • Ensure the correct connection mode (Wired, 2.4G, BT) is selected via the switch on the back.
  • For wired mode, check the USB-C cable connection.
  • For 2.4G wireless, ensure the dongle is securely plugged in and the keyboard is charged.
  • For Bluetooth, ensure the keyboard is paired correctly (Fn + Q/W/E) and charged. Try re-pairing if issues persist.
  • Check battery level (Fn + Alt).
• RGB lighting not working or stuck:
  • Ensure the keyboard is charged.
  • Check lighting settings via the driver software.
  • Try cycling through lighting modes using the knob or relevant key combinations.
• Keys not registering:
  • If a specific key is not working, the switch might be faulty or improperly seated. Use the switch puller to remove and re-insert the switch. If the issue persists, replace the switch with one of the spares provided.
  • Ensure the keyboard is not in a locked mode (e.g., WIN key lock).

6. Specifications

7. Warranty and Support

The surmen M75 keyboard comes with a standard manufacturer's warranty. Please refer to your purchase documentation for specific warranty terms and duration. For technical support, troubleshooting assistance, or warranty claims, please contact the seller or manufacturer directly through their official support channels.

For additional information and driver downloads, please visit the official surmen website or contact their customer service.