What makes the Yunzii CK75 Polar Bear keyboard unique?

The Yunzii CK75 Polar Bear stands out with its transparent acrylic case and gasket-mounted design, providing a premium typing experience and a visually striking appearance. Its hot-swappable feature allows for easy customization with different mechanical switches.

Can I use the CK75 keyboard wirelessly?

Yes, the CK75 supports triple modes of connection: wired, Bluetooth 5.1, and 2.4GHz wireless. This flexibility allows you to connect to various devices seamlessly, whether you're at your desk or on the go.

What type of switches does the CK75 Polar Bear use?

The CK75 is equipped with Coolkiller Ice Blade tactile switches, which are pre-lubed to provide a smooth and satisfying typing experience. The keyboard is also hot-swappable, allowing you to easily replace the switches without soldering.

How is the RGB lighting on the Yunzii CK75 Polar Bear?

The CK75 features south-facing RGB LEDs, which offer smoother and brighter lighting effects. It comes with a variety of default RGB settings, and you can customize them further using compatible software on Windows systems.

Is the CK75 suitable for long typing sessions?

Absolutely. The CK75's KSA profile keycaps are designed for ergonomic comfort, providing an ideal typing angle and height. Combined with the tactile Ice Blade switches and gasket-mounted design, it offers a comfortable typing experience for both gamers and typists.

How long does the battery last on the CK75?

The CK75 has a 3750mAh battery that can last up to 25 hours with the RGB lights on and up to 90 hours with the lights off. This ensures you can enjoy extended use without frequent recharging.

Can I customize the keycaps on the CK75?

Yes, the CK75 comes with durable double-shot PBT keycaps that are oil-resistant and feature vibrant dye-sub legends. You can swap these keycaps with any compatible set if you wish to personalize your keyboard further.

Does the CK75 support software customization?

Yes, the CK75 supports programmable software customization, but please note that the software is only compatible with Windows systems. This allows you to tailor your keyboard's functions and lighting to your preferences.

Yunzii CK75 Starting at $68.99

Name: Yunzii CK75
Brand: Yunzii
SKU: coolkiller-ck75-wireless-transparent-mechanical-keyboard-polar-bear

Vendor	Location	Coupon Code	In Stock	Price (USD)	Link*
Yunzii CK75
	Global	-	Check vendor	Check vendor	Visit shop
YUNZII CK75 Wireless Transparent Gasket Mechanical Keyboard-Polar Bear
	Shipping to US			$69 Out of stock	Visit Shop

Vendor

Location

Coupon Code

In Stock

Price (USD)

Link*

Yunzii CK75

Global

Check vendor

Visit shop

YUNZII CK75 Wireless Transparent Gasket Mechanical Keyboard-Polar Bear

Yunzii CK75 - Keyboard / Polar Bear / Ice Blade Switch

Shipping to US

$69

Out of stock

Visit Shop

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Compare Yunzii CK75 vs Redragon PENUMBRA K687 vs Gamakay TK75 V2 Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!

Model	Yunzii CK75	Redragon PENUMBRA K687	Gamakay TK75 V2
		72	72
Rating	0.0 stars (0 reviews)	0.0 stars (0 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2022 Has Tactile switch options Equipped with a 3750 mAh battery Weighs about 1050 g Sized at 28 x 145 x 329 mm Offers Yes, Rgb, South-face, Rgb South-face RGB lighting	Released in 2025 Has Linear switch options Features N-key rollover Supports Wired, Wired only connectivity Weighs about 1500 g Sized at 43 x 133 x 43 mm Made with a Aluminum case	Released in 2023 Has Silent switch options Includes a Yes, TFT display Includes screw-in stabilizers Equipped with a 4000 mAh battery
Score	Scores Performance: 62.9 Build Quality: 57.9 Productivity: 51.8 Customizability: 55 Portability: 73.5	Scores Performance: 78.9 Build Quality: 72.6 Productivity: 70.7 Customizability: 60.7 Portability: 60	Scores Performance: 65.2 Build Quality: 75.6 Productivity: 79.6 Customizability: 72.7 Portability: 75.2
Name	Name Yunzii CK75	Name Redragon PENUMBRA K687	Name Gamakay TK75 V2
Release year	Release year 2022	Release year 2025	Release year 2023
Switch Options	Switch Options Tactile	Switch Options Linear	Switch Options Silent
Profile	Profile Normal Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 75%	Layout Size 75%	Layout Size 75%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support	Display Support TFT
Mac/Win Support	Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Wired, Wired only	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate -	Polling Rate -	Polling Rate -
Battery capacity	Battery capacity 3750 mAh	Battery capacity -	Battery capacity 4000 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style Gasket Mount	Mount Style Gasket Mount	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb, South-face	Backlight Rgb	Backlight Rgb
Case Colors	Case Colors	Case Colors	Case Colors
Case Material	Case Material ABS	Case Material Aluminum	Case Material ABS
Keycaps Material	Keycaps Material PBT	Keycaps Material -	Keycaps Material PBT
Dimensions	Dimensions 28 x 145 x 329 mm	Dimensions 43 x 133 x 43 mm	Dimensions -
Weight	Weight 1050g	Weight 1500g	Weight -

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Product Description

The Yunzii CK75 Polar Bear is a 75% wireless mechanical keyboard suited for users who want versatile connectivity and easy switch customization. It fits those who prefer a compact layout with 80 keys and value a quieter, softer typing experience thanks to gasket mounting and pre-lubed tactile switches. This keyboard works well for both typing and casual gaming, especially if you want to swap switches without soldering.

Key Features

Supports wired USB-C, Bluetooth 5.1, and 2.4GHz wireless connections, offering flexibility for different devices and use cases.
Hot-swappable switch sockets accept 3-pin or 5-pin mechanical switches, allowing quick switch changes without soldering.
South-facing RGB LEDs provide smoother and brighter lighting effects, with software customization available on Windows.
Large 3750mAh battery supports extended wireless use, lasting up to 25 hours with lighting on and longer without.

Build Quality

Transparent acrylic case offers a solid, visually distinctive design while keeping the keyboard lightweight at just over 1kg.
Gasket mount design uses silicone and foam pads to reduce typing noise and soften keypress impact, improving comfort and acoustics.
ABS plastic case material is durable but less premium-feeling compared to metal or aluminum alternatives.

Typing Experience

Ice Blade tactile switches come pre-lubed for smoother keystrokes with moderate resistance (45gf), suitable for users who want tactile feedback without loud clicks.
Keycaps are double-shot PBT with dye-sublimated legends, offering durability and resistance to shine or fading.
KSA profile keycaps provide an ergonomic angle and height, balancing comfort for both gaming and typing sessions.

Connectivity

Triple connectivity modes allow seamless switching between wired and wireless setups depending on user preference or device compatibility.
Includes a 2.4GHz wireless dongle and Type-C cable for immediate use without extra purchases.

Trade-offs

Software customization is limited to Windows, restricting advanced programming for users on macOS or Linux.
ABS plastic case may not feel as sturdy or premium as metal alternatives.
Battery life estimates are vendor-provided and may vary with usage patterns.

Frequently Asked Questions (FAQ)