The RF 15N key switch enables a very low overall height of 6.2 mm. The overall height can be varied using the extension plunger, which is inserted into the cross-like recess in the pressure pad.
Up to an overall height of 10 mm (i.e. with or without the small plunger), LEDs can only be positioned on the PCB separately, next to the key switches. From an overall height of 12 mm, a maximum of 2 LEDs can also be plugged into locating indents in the key switch housing. To achieve satisfactory illumination, the LEDs should be placed on LED spacer sleeves from an overall height of 12.5 mm.