Hotel button outdoor unit, 10 AX, 250 V ~, 1-pole normally open contact, with red and green LED light, N-conductor required, with spring terminals for rigid conductors up to 2.5 mm², connection terminals in accordance with DIN VDE 0632 (EN 60 669), screw fastening, without fastening claws, for hotel rocker outdoor unit item no.: .. CU KO5 M .., for signalling the switching status of the indoor unit and for controlling the bell