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