Red/green illuminated display unit. The light signal insert is controlled with a roller shutter rocker switch. If both light areas are to light up at the same time, a series switch must be used. Supply voltage: AC 120 V-230 V / 60 Hz, 1.6 W. AC 150 V-230 V / 50 Hz, 1.3 W. To be completed with: Central plate with viewing window System M 5874.., 5870.. Scope of delivery: 5 pre-printed films in positive print (bell crossed out/chambermaid, /OCCUPIED/FREE/, /OCCUPIED/FREE/, /PLEASE DO NOT DISTURB/PLEASE CLEAN UP ROOM, /DO NOT DISTURB/MAKE UP ROOM/). Color: red/green.