Editing Omron B2R series (section)

===Illuminated===
The slider supports a centre LED. The LED is an unusual design, and with the legs folded upwards around the switch, it is pressed down into the top of the slider. The single return spring is replaced with two adjacent springs that fit onto short terminals. The top of each spring is straight, and the straight segments are fed through the slider and soldered to the upward-facing legs on the LED. As the LED is factory-fitted and non-removable, the positive and negative LED terminals are marked on the shell, as "K" (cathode) and "A" (anode). A single shell design and single slider design accommodate both return spring arrangements: single centre spring (non-illuminated models) and the two side-by-side springs (illuminated models).