The Topre switch was designed and manufactured in Japan to create a noncontact switch that could replicate N-key rollover while removing key chatter. At its core is a metal spring and a capacitive sensor that registers keystroke mid actuation. And while most of the resistance is created by the rubber dome sheet, these switches offer a smooth and satisfyingly tactile feel with a distinct “thock” sound at the bottom that distinguishes them from your standard rubber dome keyboard.