Cooler Master SK621 Low Profile Keyboard Review

Not that long ago we took a look at Cooler Master’s SK630 low-profile mechanical keyboard, which was a tenkeyless keyboard that featured Cherry MX low-profile mechanical key switches. We loved this keyboard and felt it was perfect for someone who does a lot of typing rather than gaming. Today Cooler Master is releasing their SK621, which is even smaller! It is a 60% keyboard that features the same low-profile Cherry MX mechanical key switches, sleek design, and RGB lighting, but now offers hybrid connectivity (Bluetooth & wired) making it the first wireless keyboard from Cooler Master in their SK series. Could this be the ultimate keyboard for the mechanical keyboard enthusiast or programmer? Read on as we find out!

Special thanks to Cooler Master for providing us with the SK621 Low Profile Keyboard to review.

Hybrid Wired & Wireless – Up to 3 devices supported with Bluetooth 4.0, or use it wired over a removable Type-C USB and charge the battery simultaneously.
Portable 60% Keyboard Layout – Mini, unique and portable design that has all the essentials
Brushed Aluminum Design – Flat brushed aluminum top plate, floating keycaps, and minimalistic and slim design built with functionality in mind
Cherry MX Low Profile Switches – A reduced travel distance and actuation point with the same signature durability and precision
RGB Backlighting – Keep the lightshow going with per-key backlighting and surrounding LED ring with endless customization
On-the-Fly Controls – Make real-time adjustments to lighting and macros with no software necessary.
Easy-to-use Software – Map 16.7 million colors to any key, customize lighting modes, or finetune macros through Cooler Master’s new Portal Software Application.
Extra Slim Keycaps – Slightly contoured, crazy slim, yet built to last
Removable Type-C USB Cable – for easy transportation and future-proofing.
Hybrid Key Rollover – Ensure every press is registered, with automatically enabled 6-key rollover in wireless mode and N-key rollover in
wired mode

The SK621 comes in Cooler Master’s typical retail packaging we’ve seen for their SK Series keyboards. On the front of the box is a photo of the keyboard and it lets us know the keyboard is Bluetooth, RGB, and features Cherry MX low profile switches.

Cooler Master SK621

Flipping the box over to the back there is another picture of the keyboard and some of the main features are detailed.

Cooler Master SK621

Opening the box up and getting everything out we have the SK621 keyboard, which comes in a small bag that you could use as a “travel bag” for the keyboard, a USB to USB-C cable, keycap remover, and a user’s guide.

Cooler Master SK621

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