Redragon PENUMBRA K687 Pro vs UCAL K673 ProAluminum vs Plastic
Choose the PENUMBRA K687 Pro for a premium aluminum build and sound, or the UCAL K673 Pro for a lighter, more budget-friendly option.
Which one should you get?
Get the
Redragon PENUMBRA K687 Pro
Aluminum
- CNC aluminum case construction for a solid, premium feel.
- Extensive 5-layer noise dampening system including multiple foam types and a PET sound pad.
- Includes four spare switches in the package.
- Higher price point compared to the UCAL model.
- Heavier weight (1800g) reduces portability.
- Does not include a keycap puller, only a switch puller is implied by spare switches.
Get the
Redragon UCAL K673 Pro
Plastic
- More affordable price point.
- Lighter weight (1200g) for easier portability and desk adjustment.
- Package includes a dedicated keycap and switch puller.
- Plastic case construction versus aluminum.
- Simpler 2-layer sound dampening system.
- Vendor description lists a 3000mAh battery, while metadata suggests 4000mAh, causing potential confusion.
Your budget and priority for material quality dictate the choice here. If you want the heft, acoustic refinement, and durability of an aluminum chassis and are willing to pay more for it, the Redragon PENUMBRA K687 Pro is the clear selection. If you need a capable, lightweight wireless keyboard for general use and want to spend less, the Redragon UCAL K673 Pro delivers excellent core features in a plastic package.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Redragon PENUMBRA K687 Pro
Redragon UCAL K673 Pro
Case material
Aluminum
Plastic
Weight
1,800 g
1,200 g
N-key rollover
Yes
No
Released
2024
2023
Dimensions
43 x 132 x 43 mm
37 x 335 x 37 mm
- Redragon PENUMBRA K687 Pro
- Redragon UCAL K673 Pro
- Performance
- 7966
- Build quality
- 7363
- Productivity
- 7169
- Customizability
- 6158
- Portability
- 7575
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Switch options: Linear
- Mount style: Gasket Mount
- Knob
What will you mostly use it for?
The PENUMBRA K687 Pro wins for use cases where build solidity, acoustic quality, and a premium feel are paramount, such as gaming, modding, and content creation. The UCAL K673 Pro is the better pick for office users and travelers who value a lighter keyboard and a lower price. For programming, both keyboards are equally capable due to their shared core layout and hot-swap features.
Pick the Redragon PENUMBRA K687 Pro
- Heavier CNC aluminum frame provides more stability during intense use.
- The manufacturer lists a more extensive 5-layer noise dampening system for a cleaner acoustic profile.
- Includes N-Key Rollover as a listed feature for simultaneous key presses.
Redragon PENUMBRA K687 Pro vs UCAL K673 Pro specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
5 of 19 specs differ
Redragon PENUMBRA K687 Pro
Redragon UCAL K673 Pro
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
N-key rollover
Released
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Redragon PENUMBRA K687 Pro vs UCAL K673 Pro: your questions
The core difference is the case material. The PENUMBRA K687 Pro features a CNC aluminum frame, while the UCAL K673 Pro uses a plastic case. This results in a significant weight difference (1800g vs 1200g) and a higher price for the aluminum model.
According to the manufacturer's descriptions, the PENUMBRA K687 Pro has a more comprehensive dampening system. It uses five layers including PO foam, IXPE switch foam, a PET sound pad, bottom socket foam, and a silicone pad. The UCAL K673 Pro is described as having two layers of sound-absorbing foam.
Yes, both keyboards feature hot-swappable sockets. The vendor pages state that both support nearly all 3-pin and 5-pin mechanical switches, allowing for easy switch customization without soldering.
Yes, both the Redragon PENUMBRA K687 Pro and the UCAL K673 Pro include a dedicated control knob. The manufacturer states this knob controls backlight brightness, volume, and media playback functions.
Both are tri-mode keyboards. They support connection via a detachable USB-C cable, a 2.4GHz wireless receiver, and Bluetooth. The K673 Pro specifically mentions a dongle storage socket on the keyboard itself.
The UCAL K673 Pro is more portable. It is 600 grams lighter than the PENUMBRA K687 Pro (1200g vs 1800g) and has a lower listed profile height. The plastic construction is also less prone to showing travel wear compared to an aluminum finish.
Both keyboards come with PBT keycaps. The PENUMBRA K687 Pro is listed with PBT gradient keycaps, while the UCAL K673 Pro description mentions mixed-color PBT keycaps with a deep blue and white design.
Yes, the vendor pages for both keyboards state that pro software is supported. This software, available for download, allows for creating custom macros, keybindings, and lighting effects.
Both are listed with linear switch types. The PENUMBRA K687 Pro comes with 'Hi-Fi Custom' linear switches, while the UCAL K673 Pro is listed with 'Linear Red Switches'. Both are hot-swappable, so switches can be changed.
The PENUMBRA K687 Pro includes the keyboard, four spare switches, a receiver, a USB-C cable, and a manual. The UCAL K673 Pro includes the keyboard, a USB-C cable, a keycap and switch puller, spare switches, and a manual.
The PENUMBRA K687 Pro is likely better for a quiet office due to its more extensive 5-layer dampening system designed to reduce hollow noise and create a cleaner acoustic profile. However, the UCAL K673 Pro also includes sound-absorbing foams.
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