A mechanical keyboard is a type of keyboard that uses mechanical switches to detect key presses. Key travel and actuation force in a mechanical keyboard refer to the distance and pressure required to press a key.

Key travel refers to the distance a key must move when pressed, also known as keystroke distance. Typically, mechanical keyboards have a key travel of 2mm to 4mm, while membrane keyboards have a key travel of 1mm to 2mm. When a key is pressed, it needs to move to the bottommost point, known as the actuation point, to input a character.

Actuation force refers to the amount of force needed to trigger a key press. The actuation force of a mechanical keyboard is typically between 40 grams to 70 grams, while membrane keyboards have a lighter actuation force, usually below 35 grams.

Both key travel and actuation force of a mechanical keyboard can affect the comfort and accuracy of typing. The longer the key travel and the higher the actuation force, the more finger strength is required, but there is also better tactile feedback. Therefore, when choosing a mechanical keyboard, one should consider their own usage habits and needs.

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