This is the latest evolution of Gateron's classic MX switch line. The KS-9 switch body has a cutout at the rear, designed to accomodate surface-mount LED lighting, for boards which support RGB. They also fit perfectly well on boards without RGB, of course.
The yellow edition has a light-moderate actuation force (50g), with a linear action.
The blue edition has a slightly heavier actuation force (60g), and has a clicky, slightly tactile action.
|Actuation force||(see notes above)|
|Operational lifespan||50 million activations|
|Country of manufacture||China|