Set consists of: -A call button with LED reassurance lamp (red) and 2 m pull cord including central plate in Design System M. -A stop button with LED reminder lamp including central plate in Design System M. -A room signal light (white) for optical (red LEDs) and acoustic signaling. -A power supply unit to provide the system voltage 24 VAC, 0.6 A, 3PLE. For additional optical and acoustic signaling, an ELSO SIGMA/WC call group signal light, ELSO Art. 740020, can be connected. Use without claw fastening. Scope of delivery: Without frame. Material: Brilliant thermoplastic. Color: polar white glossy.