You searched for "continuity check"
Werma
Werma Blinking, Continuous Effect Buzzer Unit, 5 V, LED Bulb
Part: 860.000.18
Low-voltage LED buzzer unit for signal towers with continuous or flashing sound.
Werma
Werma Black Blinking, Continuous Effect Buzzer Unit, 100 → 240 V, LED Bulb, AC
Part: 860.640.07
Black buzzer light unit combining sound and visual warning signals.
Werma
Werma SignalSET Series Continuous lighting Effect Body Extender, 24 V, LED Bulb
Part: 860.000.15
LED body extender for stacking signal tower modules at 24V.
Werma
Werma Black Blinking, Continuous Effect Buzzer Unit, 100 → 240 V, LED Bulb, AC
Part: 860.840.07
Combined buzzer and blinking light for dual alarm warning signals.