Can you change out the knob? Or is it permanently stuck to the board?

The metal knob is hot swappable, you may replace it with other color knobs.

What the key to the 3 below the knob are? can you remap the keys?

The three keys below the knob are "home", "pgup", and "pgdn". You can also modify the corresponding key through software.

Can the tk75 pair with multiple devices? for example,will i be able to switch to my laptop and monitor at the same time?

Yes, it can connect 4 wireless devices and 1 wired device at the same time. It had no issues switching between two different computers. The switch was fast and reliable.

why it displayed the battery 1% on the Bluetooth setting?

If you plug in the cable while in wired mode and try to switch to wireless mode by pressing FN+123/4, the system will detect that the keyboard battery is only at 1%.

Does TK75 support to upgard firmware and how to do it?

Yes, the TK75 can upgrade the firmware online and it supports to the OTA upgrade fuctions. You can also use 2.4g receiver to upgrade the firmare as well.

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Description

🎮 Elevate your desk game with the TK75—where style meets pro-level performance!

PREMIUM BUILD COMFORT - Durable PBT Cherry profile keycaps and EVA positioning plate for noise reduction and all-day comfort.
EFFORTLESS CUSTOMIZATION - Hot-swappable switches let you tailor your typing feel without soldering.
IMMERSIVE RGB EXPERIENCE - 1600+ programmable lighting effects sync with music for a dynamic setup.
FUTURE PROOF COMPATIBLE - Cloud driver upgrades and automatic Mac/Windows detection keep you ahead of the curve.
SEAMLESS MULTI MODE CONNECTIVITY - Bluetooth, 2.4GHz wireless, or wired USB-C—choose your perfect workflow.

The GK GAMAKAY TK75-V2 is a 75% mechanical keyboard designed for professionals and gamers seeking versatility and durability. Featuring Bluetooth, 2.4GHz wireless, and wired USB-C connectivity, it offers seamless switching between devices. Equipped with hot-swappable Gateron Red switches and premium PBT Cherry profile keycaps, it ensures a customizable and comfortable typing experience. Its 3000mAh battery supports extended use, while 1600+ RGB lighting effects with music sync add a personalized flair. Automatic Mac and Windows compatibility plus cloud driver updates make it a future-ready choice for any setup.

Specifications

Brand	GK GAMAKAY
Manufacturer	GK GAMAKAY
Model	TK75
Model Name	TK75
Product Dimensions	32.89 x 14.43 x 2.79 cm; 1.28 kg
Item model number	TK75
Operating System	Windows 10
Hardware Platform	PC
Hardware Interface	Bluetooth
Compatible Devices	PC
Special Features	Hot-swappable, button control, RGB backlight with 1600 programmable light effects, music rhythm and effects functions, improved macro button mode
Mounting Hardware	Hot Swap RGB Bluetooth 5.0/2.4GHz Wireless/USB-C Cable, PBT Cherry Profile Keycaps
Number of items	1
Power Source	Battery Powered
Batteries Included	No
Batteries Required	No
Keyboard Description	Gaming
Connector Type	USB-C
Material	Plastic
Hand Orientation	Ambidextrous
Manufacturer	GK GAMAKAY
Item Weight	1 kg 280 g

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