Compare Coolkiller PolarBear vs Lofree EH121 Differences Side by Side

This comparison is for users seeking a mechanical numpad that doubles as a calculator. The decision is difficult because both offer a unique 2-in-1 function with gasket-mounted typing and hot-swappable switches. The Coolkiller PolarBear emphasizes a portable, transparent calculator design with RGB lighting, while the Lofree EH121 focuses on versatile tri-mode connectivity and a more traditional layout with a ten-digit display.

Model
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Rating	0.0 stars (0 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2023 Has Linear switch options Features N-key rollover Has built-in sound dampening Supports Wired, Wireless connectivity Equipped with a 1500 mAh battery Weighs about 296 g Sized at 30 x 65 x 84 mm Features PBT keycaps Offers Yes, White RGB lighting	Released in 2024 Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity Equipped with a 950 mAh battery Weighs about 252 g Sized at 39 x 149 x 94 mm Features ABS, PC keycaps Offers No RGB lighting
Score	Scores Performance: 59.3 Build Quality: 62 Productivity: 72 Customizability: 56 Portability: 87.2	Scores Performance: 45.2 Build Quality: 59.1 Productivity: 60.6 Customizability: 50.2 Portability: 87.1
Name	Name Coolkiller PolarBear	Name Lofree EH121
Release year	Release year 2023	Release year 2024
Switch Options	Switch Options Linear	Switch Options -
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size Numpad	Layout Size Numpad
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate -	Polling Rate -
Battery capacity	Battery capacity 1500 mAh	Battery capacity 950 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style Gasket Mount	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight White	Backlight
Case Colors	Case Colors	Case Colors
Case Material	Case Material Plastic	Case Material Plastic
Keycaps Material	Keycaps Material PBT	Keycaps Material ABS, PC
Dimensions	Dimensions 30 x 65 x 84 mm	Dimensions 39 x 149 x 94 mm
Weight	Weight 296g	Weight 252g

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Pros and Trade-offs

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.

Coolkiller PolarBear

+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.
+Has a larger 1500mAh rechargeable battery.
+Features RGB white backlighting and N-Key Rollover.

−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.

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.
+Larger 20-key layout may provide more immediate function access.
+Features an adjustable single-color warm light backlight.

−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.

Which Keyboard Is Better for Your Needs?

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.

GamingCoolkiller 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.

OfficeLofree EH121

•Offers tri-mode connectivity (Bluetooth, 2.4 GHz, wired) for easy switching between multiple office devices.
•Includes a larger ten-digit display for clearer calculation readouts.
•Has a 20-key layout which may provide more dedicated function keys.

ProgrammingTie

•Both are hot-swappable, allowing for switch customization based on typing preference.
•Both feature gasket mount designs for a softer typing feel during long sessions.
•Both offer Mac and Windows compatibility.

TravelCoolkiller PolarBear

•Smaller physical dimensions (84mm x 65mm vs 94mm x 149mm).
•Larger 1500mAh battery capacity compared to 950mAh.
•Functions as a fully standalone, cable-free mechanical calculator.

ModdingCoolkiller PolarBear

•Vendor description explicitly states support for 3-pin and 5-pin switches.
•Comes with transparent PBT keycaps and a transparent case for a unique aesthetic base.
•Includes sound dampening material, as noted in its extra features.

Content CreationLofree EH121

•Tri-mode connectivity allows seamless use with tablets, laptops, and desktop setups.
•Adjustable single-color backlight is cited as useful for low-light work environments.
•The ten-digit display can be helpful for numerical data entry and calculations.