1-pole (working current), with N terminal. With 2 independent signal contacts. With labeling field. Labeling field 57.8 x 9.8 mm. Label holder can be illuminated with lighting insert 2152 NLI-53. Button can be illuminated by inserting lamp 8332-1, 8335-1, 8346-1, 8333-1 and 8358. Suitable labeling software at www.BUSCH-JAEGER-Beschriftungstool.de.