Coolkiller PolarBear vs Lofree EH121Calculator Numpad or Tri-Mode?
Choose the Coolkiller PolarBear for its standalone calculator function and transparent aesthetic, or the Lofree EH121 for its tri-mode wireless flexibility and larger display.
Which one should you get?
Get the
Coolkiller PolarBear
Battery
- Functions as a fully standalone, cable-free mechanical calculator.
- Includes transparent PBT keycaps and a transparent case design.
- Comes with sound dampening foam and a gasket mount for a softer typing feel.
- Lacks the tri-mode wireless connectivity of the Lofree model.
- Smaller 18-key layout offers fewer keys than some alternatives.
- Wired connectivity is primarily highlighted, with wireless functionality less defined.
Get the
Lofree EH121
- Offers tri-mode connectivity with Bluetooth 5.3, 2.4 GHz, and wired USB-C.
- Includes a ten-digit display for calculations.
- Comes with a 2.4 GHz receiver in the box.
- Has a smaller 950mAh battery capacity.
- Lacks RGB lighting options.
- Keycaps are a blend of ABS and PC, which may show shine over time more than PBT.
Your primary need dictates the choice. If you want a numpad that truly works as an independent, portable calculator with a unique transparent look, the Coolkiller PolarBear is the clear pick. If your priority is connecting seamlessly to multiple devices wire-free and you value a clear numerical display, the Lofree EH121's tri-mode connectivity makes it the more flexible companion. Both are competent, hot-swappable numpads at a similar price point.
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.
Coolkiller PolarBear
Lofree EH121
Connection
Wired, Wireless
Bluetooth, 2.4 GHz, Wired
Battery
1,500 mAh
950 mAh
Weight
296 g
252 g
Sound dampening
Yes
No
Keycaps
PBT
ABS, PC
- Coolkiller PolarBear
- Lofree EH121
- Performance
- 6045
- Build quality
- 6159
- Productivity
- 7260
- Customizability
- 5550
- Portability
- 8787
- Layout size: Numpad
- Hot-swappable
- Case material: Plastic
- Mount style: Gasket Mount
What will you mostly use it for?
The Lofree EH121 is the more versatile daily driver, winning for office use and content creation due to its robust wireless options and functional display. The Coolkiller PolarBear excels in portability and as a modding platform, taking the lead for travel and customization. For gaming, the PolarBear's specified features give it an edge, while programmers will find both keyboards equally capable due to their shared core modding features.
Pick the Coolkiller PolarBear
- Includes N-Key Rollover for simultaneous key presses, a feature not listed for the Lofree EH121.
- Offers RGB backlighting for visual customization.
- Has a specified linear switch type, which is often preferred for gaming.
Coolkiller PolarBear vs Lofree EH121 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
9 of 19 specs differ
Coolkiller PolarBear
Lofree EH121
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Connection
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
N-key rollover
Mac & Windows
Released
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Coolkiller PolarBear vs Lofree EH121: your questions
The Lofree EH121 offers more comprehensive wireless options. Its product listing specifies tri-mode connectivity, including Bluetooth 5.3, 2.4 GHz wireless with a dedicated receiver, and wired USB-C. The Coolkiller PolarBear's wireless capabilities are less explicitly detailed in the provided description.
Yes. According to Coolkiller's vendor description, the PolarBear is designed as a 2-in-1 device. When you remove the USB cable, it functions as a standalone 18-key portable transparent mechanical calculator powered by its internal battery.
Yes, both the Coolkiller PolarBear and the Lofree EH121 are listed as hot-swappable. The PolarBear's description specifically mentions support for 3-pin and 5-pin MX-style switches, allowing for easy DIY customization without soldering.
The Coolkiller PolarBear has a larger 1500mAh battery compared to the Lofree EH121's 950mAh battery. While actual runtime depends on usage and lighting, the PolarBear's higher capacity suggests a potential for longer use between charges.
The Coolkiller PolarBear uses transparent PBT keycaps. The Lofree EH121 uses keycaps made from a blend of ABS and PC material. PBT is generally known for being more resistant to wear and shine compared to ABS.
Both have backlighting, but of different types. The Coolkiller PolarBear features RGB white backlighting. The Lofree EH121 has an adjustable single-color warm light backlight with four brightness levels, which its vendor page notes is for worry-free use at night.
The Coolkiller PolarBear includes the keyboard, a coiled Type-C cable, a 2-in-1 switch/keycap puller, and a manual. The Lofree EH121 includes the numpad, a Type-C cable, a 2.4G receiver, and a user manual.
Only the Lofree EH121 includes a display. Its vendor description mentions a ten-digit display for showing calculations. The Coolkiller PolarBear does not have a screen.
Both the Coolkiller PolarBear and the Lofree EH121 use a gasket mount style. This design uses gasket material to suspend the plate, which typically creates a softer, more flexible typing feel compared to tray-mounted boards.
The Coolkiller PolarBear is significantly smaller and lighter, making it more portable. It measures 84mm x 65mm x 30mm and weighs 296g. The Lofree EH121 measures 94mm x 149mm x 39mm and weighs 252g, so it is wider and longer but slightly lighter.
Yes, both the Coolkiller PolarBear and the Lofree EH121 list Mac support in their extra features, indicating compatibility with macOS systems.
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