Введение
The MMD KM40 is a versatile mechanical keyboard designed for both gaming and professional use. Featuring a robust CNC aluminum body and an O-Ring gasket structure, it offers a premium typing experience. With three connection modes (Bluetooth 5.0, 2.4G Wireless, and wired Type-C), QMK/VIA compatibility for full key customization, and vibrant RGB lighting, the KM40 provides flexibility and performance for various computing environments.
Содержимое упаковки
- MMD KM40 Mechanical Keyboard
- Type-A to Type-C Data Cable
- Руководство пользователя (этот документ)
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1. Зарядка клавиатуры
Before initial use, ensure the keyboard is fully charged. Connect the provided Type-A to Type-C data cable to the keyboard's Type-C port and a computer's USB port. A full charge typically takes a few hours.

Important Charging Precaution: Always use a computer's standard USB port for charging. Avoid using fast chargers or high-current charging adapters, as this may damage the battery or PCB and void the warranty.
2. Режимы подключения
The MMD KM40 supports three connection methods:

The MMD KM40 supports Bluetooth, 2.4G wireless, and wired Type-C connections.
Проводное соединение (Type-C)
- Connect the Type-C end of the data cable to the keyboard and the Type-A end to your computer's USB port.
- Клавиатура будет автоматически распознана и готова к использованию.
Беспроводное соединение 2.4G
- Найдите USB-приемник 2.4 ГГц (обычно он находится в отсеке на клавиатуре).
- Подключите USB-приемник 2.4G к свободному USB-порту вашего компьютера.
- Switch the keyboard to 2.4G mode (refer to the keyboard's function keys or switch for mode selection).
- The keyboard should connect automatically. If not, press the pairing button (if available) or consult the QMK/VIA software for pairing instructions.
Bluetooth 5.0 Connection (Three Channels)
- Переключите клавиатуру в режим Bluetooth.
- Включите Bluetooth на вашем компьютере или устройстве и выполните поиск новых устройств.
- Select "MMD KM40" (or similar name) from the list of available devices.
- При появлении запроса введите код сопряжения.
- The KM40 supports up to three Bluetooth devices. Use the designated function keys (e.g., Fn + 1, Fn + 2, Fn + 3) to switch between paired devices.
Инструкция по эксплуатации
1. Key Customization (QMK/VIA)
The MMD KM40 keyboard is fully customizable using QMK/VIA software. This allows you to remap keys, create macros, and configure multiple layers of key functions.

The keyboard supports open-source QMK/VIA for advanced customization.
The keyboard features 44 keys with 10 customizable layers, offering up to 430 actual usable key values. The default key values are for display purposes; actual settings need to be configured by the user.

The 10 customizable layers include settings for regular use, gaming, modeling, editing, color grading, office tasks, tables, drawing, code, and connection/lighting.
Чтобы настроить:
- Download the QMK Toolbox or VIA software from the official QMK/VIA webсайт.
- Connect your keyboard via the Type-C cable.
- Follow the software instructions to remap keys, create macros, and manage layers.
2. Световые эффекты
The KM40 features 22 types of lighting effects and 16 million color RGB dazzling lights. Use the designated function keys (e.g., Fn + specific key) to cycle through lighting modes, adjust brightness, and change colors. Refer to the QMK/VIA software for advanced lighting customization.
3. Коммутаторы с возможностью горячей замены
The keyboard features full-key hot-swappable sockets, allowing you to easily change mechanical switches without soldering. This enables users to customize the typing feel to their preference.
4. Совместимые платформы
The MMD KM40 is compatible with Windows and Mac operating systems.
Обслуживание
1. Уборка
- Протрите поверхность клавиатуры мягкой сухой тканью.
- Для удаления стойких загрязнений слегкаampсмочите ткань водой или мягким чистящим раствором.
- Для очистки пространства между колпачками клавиш используйте сжатый воздух или небольшую щетку.
- Keycaps can be removed for deeper cleaning. Use a keycap puller to avoid damage.
2. Уход за колпачками клавиш
The keycaps are made of 1.7mm thick PBT with five-sided dye-sublimation, which is durable and resistant to wear and shine. Avoid using harsh chemicals or abrasive materials that could damage the keycap legends.
Поиск неисправностей
1. Клавиатура не отвечает
- Проводной режим: Убедитесь, что кабель Type-C надёжно подключён к клавиатуре и компьютеру. Попробуйте использовать другой USB-порт или кабель.
- Беспроводной режим 2.4G: Ensure the 2.4G receiver is plugged in and the keyboard is switched to 2.4G mode. Re-pair if necessary.
- Режим Bluetooth: Check if Bluetooth is enabled on your device and the keyboard is in Bluetooth mode. Try re-pairing the device. Ensure the keyboard is charged.
2. Клавиши не работают
- If individual keys are not working, try removing and re-inserting the switch for that key, as the keyboard is hot-swappable.
- Убедитесь, что под клавишной крышкой или переключателем нет мусора.
- If using custom key mappings, reset to default or check your QMK/VIA configuration.
3. Проблемы с зарядкой
If the keyboard is not charging, ensure you are using a standard computer USB port and not a fast charger. Refer to the charging precautions in the Setup section.
4. Lighting Not Working
- Check if the lighting is turned off or set to minimum brightness.
- Cycle through lighting effects using function keys.
- Verify lighting settings in QMK/VIA software.
Технические характеристики

Detailed configuration list for the MMD KM40 keyboard.
| Особенность | Описание |
|---|---|
| Основной материал | National standard 6063 aluminum, pure CNC precision carving |
| Доступные цвета | Starry Night Black, Starlight Silver, Pomegranate Red, Military Green, Cloud White, Guifei Pink |
| Поверхностный процесс | Анодное окисление, электрофорез |
| Клавиша | 1.7mm thickened, five-sided high-content PBT dye-sublimation |
| Switch Body (Shaft) | NP Linear Switch (45gf), INK Linear Switch (62gf), INK White Linear Switch (45gf) |
| Звуковой пакет | Poron cotton, IXPE switch pad, PET sound pad, switch seat cotton, bottom cotton, anti-static film |
| Структура | O-Ring Gasket Structure |
| Режимы подключения | Bluetooth 5.0 (three channels), 2.4G Wireless, Type-C Wired |
| Функции | QMK/VIA 44 keys fully customizable |
| Пластина позиционирования | Transparent frosted PC positioning plate |
| Печатная плата | Pure white 1.2mm PCB |
| Возможность горячей замены | Full key hot-swappable |
| Аккумулятор | 2000мАч |
| Приводное решение | QMK/VIA |
| Освещение | 22 types of effects, 16 million color RGB dazzling lights |
| Аксессуары | User Manual, Type-A to Type-C data cable |
| Размеры | Length 235mm * Width 85mm * Height 20-28mm (excluding keycaps) |
| Масса | Приблизительно 0.62 кг |

Force curves for Colorful INK, New Star NP, and INK White Linear switches.

Detailed diagram of the keyboard's O-Ring gasket structure and internal components.
Советы пользователей
- Поэкспериментируйте с различными типами переключателей, чтобы найти наиболее удобные для вас ощущения от печати благодаря конструкции с возможностью горячей замены.
- Utilize the QMK/VIA software to create custom key layouts for specific applications or games to enhance productivity and gaming performance.
- Возьмите Advantage of the three connection modes to seamlessly switch between multiple devices (e.g., desktop, laptop, tablet).
Гарантия и поддержка
For warranty information, technical support, or any product-related inquiries, please contact the seller or the official MMD customer service. Keep your purchase receipt as proof of purchase.

