Razer Tartarus Pro – Mercury
RAZER ANALOG OPTICAL SWITCH
While most gaming keypads and keyboards register a singular input when pressing a key, the Razer Tartarus Pro is fitted with Razer Analog Optical Switches which can register scaling levels of input in the same motion depending on how far you press. This allows for a more measured and nuanced form of control.
For example, a half press will cause your character to walk, while a full press will get them to run. This type of control is similar to how you might move your character using analog thumbsticks on a controller.