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Blue switch has paragraph sense , when you press it ,it have a "kacakaca" sound
Black switch no paragraph sense, but the resilience is good, straight up straight down
Red switch = light version of the black switch (its press force is less than the black switch)
1. The keyboard with light version is anti-ghosting keyboard, while the keyboard without light version has only 28 buttons to prevent ghosting.
2.English letters are light-transmitting characters, and Russian letters are laser engraving characters.