The Dareu Ultra 68 features an independently swappable F-row module, allowing the keyboard to physically transition between a 68-key layout (lacking an F-row) and a 75-key layout (including an F-row). This breaks the traditional paradigm where a keyboard’s layout is fixed from the factory—the layout is no longer an immutable «identity» locked in by PCB traces and chassis cutouts, but rather a «switchable attribute» that users can adapt to their specific needs. This functionality is engineered using a combination of Pogo pin connectors and a quick-release mechanism (utilizing ball detents and magnets). The trade-offs include potential concerns regarding the reliability of the electrical contact between the F-row module and the main chassis, as well as the increased costs associated with a modular design.
I. From «Fixed Identity» to «Switchable Attribute»
In traditional keyboards, the layout is locked in during the PCB design phase. A 68-key keyboard lacks a dedicated physical F-row, requiring users to access F1–F12 keys via Fn-key combinations; conversely, a 75-key keyboard includes a full F-row. Typically, this choice must be made at the time of purchase and cannot be altered later.
The Dareu Ultra 68 takes a different approach: it detaches the F-row from the main keyboard body, transforming it into an independent, removable module. A mounting slot is provided at the top of the keyboard, where users can install an F1–F12 key module to achieve a full 75-key layout. Alternatively, this can be replaced with a 335-LED dot-matrix screen module, reverting the keyboard to a 68-key layout while adding a display capable of showing custom pixel art, GIFs, or scrolling text.
This shifts the power to define the keyboard layout from the manufacturer to the user. Using the same PCB and chassis, the keyboard can physically transform between two different configurations by simply swapping the top module. This marks the first time a modular F-row has been introduced as a core selling point for a mass-produced keyboard, moving beyond the experimental projects often seen within the custom mechanical keyboard community.
II. Engineering Foundation: The Combination of Pogo Pins and Quick-Release Mechanisms
The F-row module’s plug-and-play functionality relies on two key physical design elements.
Signal and power transmission are handled via Pogo pin contacts. The F-row module on the Ultra 68 connects to the main chassis through metal contacts rather than ribbon cables or traditional pin headers. As the module is attached, the spring-loaded Pogo pins are compressed, creating a stable electrical connection that facilitates the transmission of key-matrix signals, as well as data and power for the display. This approach offers several advantages: there are no trailing cables when removing a module, and no precise plug alignment is required during installation—magnetic attraction or mechanical pressure ensures both proper positioning and electrical connectivity.
The mechanical securing method varies depending on the switch type: the version with magnetic switches (Hall-effect switches) uses a ball-detent mechanism, while the version with inductive switches utilizes a magnetic attachment system. The ball-detent mechanism employs a spring-loaded steel ball that engages with a groove to lock the module in place—pressing it releases the lock, while snapping it into position secures it. The magnetic attachment relies on magnetic force; this makes installation and removal more straightforward, though the holding strength depends on the power of the magnets. Both solutions share the same goal: to allow the F-row module to be swapped without the need for tools or the disconnection of any internal ribbon cables.
This design lowers the barrier for changing keyboard layouts to a level comparable to simply swapping out keycaps. Users do not need to open the keyboard housing, perform any soldering, or handle delicate flexible printed circuit (FPC) cables; they simply remove the old module and drop in a new one.
III. Performance Foundation: Modularity Without Compromising Switch Specifications
While the modular F-row is the most prominent distinguishing feature of the Ultra 68, its core performance specifications remain uncompromised.
The keyboard is powered by Dareu’s proprietary «Chihuo» (炽火) control solution, supporting an 8000Hz polling rate and a Rapid Trigger precision of 0.01mm. Regarding the switches, two versions are available: the «Wine Red» and «Metallic Black» models feature Luban magnetic switches (actuation force: 35±5gf; adjustable actuation distance: 0.1–3.5mm) and support wired-only connectivity. The «Metallic Silver» model utilizes Kailh «Thunder» inductive switches, supports both 2.4G wireless and wired connections, and includes an 8000mAh built-in battery.
In terms of construction, the inductive-switch version employs a gasket-mounted design with four layers of dampening material to minimize hollow, resonant sounds. The all-aluminum chassis comes in three finishes: Wine Red (anodized and sandblasted), as well as Metallic Black and Metallic Silver (both anodized and brushed).
This means the modular F-row is not merely a «gimmick» that compromises core performance; rather, it is integrated into a robust, high-performance system featuring 8K-polling-rate magnetic or inductive switches. Users do not have to choose between a flexible layout and competitive-grade performance.
IV. Boundaries: The Costs and Uncertainties of Modularity
The ability to switch layouts introduces certain engineering limitations that must be acknowledged.
The reliability of the F-row module’s electrical contacts is a critical factor. With repeated assembly and disassembly, the springs within the Pogo pins may experience fatigue, leading to reduced contact pressure and potentially unstable signal transmission. Furthermore, because a display module requires higher data-transfer integrity than a standard key matrix, any fluctuations in contact resistance could result in display issues. Additionally, the gaps required for modularity mean that the device’s resistance to dust and water is lower than that of a keyboard with a unified, one-piece chassis.
Modularity also drives up costs. The Ultra 68 starts at 799 RMB, with higher prices for configurations that include a display module or the dual-mode inductive-switch version. In effect, users are paying for a «dual-purpose» system; if they only ever use one configuration, the premium paid for modularity remains unrealized.
The true utility of the «switchable layout» feature depends on how frequently a user actually changes configurations. For those who require an F-row for certain tasks (such as office work or RTS games) but also need a compact form factor (such as for FPS games, where more space is required for mouse movement), the physical ability to switch layouts offers genuine value. However, for users who only utilize a single mode, this attribute functions more as a «backup option» rather than something used frequently in day-to-day operations.
