Set consists of: -A call button with LED reassurance lamp (red) and 2m 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 flush-mounted power supply unit to provide the system voltage 24 VDC, 0.5A. 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.