Non-Illuminated Annunciator, 22 mm, No Action, Type of Operator Annunciator, Basic Material Plastic, Head Material Plastic, Color Black, NEMA Rating 1, IP Rating 40, Legend No Legend, Standards CSA, EN/IEC 60947-1, EN/IEC 60947-5-1, UL, Features Operating Voltage 24V AC 50/60 Hz