Light signal with frame S.1 polar white, matt. Light signal with frame, central piece for plug-in fastening, ring tone retention in the event of a power failure and return. With potential-free relay contact for ring tone forwarding, e.g. to a telephone dialer, 4 red LEDs, ring tone can be set as a continuous signal or pulsating, acoustic ring tone can be switched on at the light signal, screw terminals. For visual and acoustic alarm in emergency situations. Note: The device must be installed in a place where it is easily visible. Use a deep flush-mounted box (recommendation).