The Cooler Master SK621 sports the CHERRY MX Low Profile switches that made the keyboard ultra-portable and 60% slimmer than most mechanical keyboards.
The Cooler Master SK621 was first teased last year and wasn’t released until today. The Cooler Master SK621 sports the CHERRY MX Low Profile switches that made the keyboard ultra-portable and 60% slimmer than most mechanical keyboards. Keeping up with its ultra-portability and ultra-compact design, the Cooler Master SK621 keyboard can go wireless with its Bluetooth 4.0 connectivity. Hence, a detachable USB Type-C braided cable can be used for charging and connection as well. For aesthetics and durability, the Cooler Master SK621 sports a brushed aluminium top plate along with its contoured floating key for functionality and style.
Source: Twitter
The Cooler Master SK621 was supposed to be launched in October 2018 but delays pushed the launch this May. The SK621 is a first of its kind, sporting the tactile feel and compact design of the CHERRY MX Low Profile switches and the convenience connectivity of wireless Bluetooth 4.0 – offering clean aesthetics in a space-saving ultra-compact keyboard. The Cooler Master SK621 can last for four to five months without backlighting, up to 15 hours with RGB backlighting. The SK621 comes with per-key RGB backlighting and comes with onboard memory for saving profiles, tweaking settings, and personalizing RGB lighting without the need for software.
Cooler Master SK621 Specifications
KEYBOARD SWITCH TYPE: Cherry MX RGB Low Profile Switch
MATERIAL: Aluminium, Plastic
COLOR: Gunmetal
KEYBOARD POLLING RATE: 1000Hz
KEYBOARD RESPONSE RATE: 1ms / 1000Hz
KEYBOARD MCU: 32bit ARM Cortex M3
ONBOARD MEMORY: 512KB
ON-THE-FLY SYSTEM: Yes, for Multi-media, Macro Recording and Lighting Control
MULTIMEDIA KEYS: Through Function Key (FN)
CABLE: USB Type-C Detachable & Braided
SOFTWARE: Yes, through Portal
WIRELESS CONNECTIVITY: Bluetooth 4.0
KEYBOARD CONNECTOR CABLE: USB Type-C (Keyboard Side), USB 2.0 Type A (Computer Side)
CABLE LENGTH: 1.8m, Braided & Removable
KEYBOARD DIMENSIONS: 293(L) x 103(W) x 29.2(H) mm
WEIGHT: 424g / 0.934lbs (without cable)
KEYBOARD SWITCH TYPE: Cherry MX RGB Low Profile Switch
MATERIAL: Aluminium, Plastic
COLOR: Gunmetal
KEYBOARD POLLING RATE: 1000Hz
KEYBOARD RESPONSE RATE: 1ms / 1000Hz
KEYBOARD MCU: 32bit ARM Cortex M3
ONBOARD MEMORY: 512KB
ON-THE-FLY SYSTEM: Yes, for Multi-media, Macro Recording and Lighting Control
MULTIMEDIA KEYS: Through Function Key (FN)
CABLE: USB Type-C Detachable & Braided
SOFTWARE: Yes, through Portal
WIRELESS CONNECTIVITY: Bluetooth 4.0
KEYBOARD CONNECTOR CABLE: USB Type-C (Keyboard Side), USB 2.0 Type A (Computer Side)
CABLE LENGTH: 1.8m, Braided & Removable
KEYBOARD DIMENSIONS: 293(L) x 103(W) x 29.2(H) mm
WEIGHT: 424g / 0.934lbs (without cable)
The Cooler Master SK621 is expected to have an MSRP of $119.99 USD, to be made available this May 2019. Learn more about the Cooler Master SK621 Low-Profile Tenkeyless Keyboard here.






