low battery alarm

instantaneous main battery voltage (flashes when below alarm threshold)

launching battery (missile battery)

battery coolant unit / battery-coolant unit (BCU)

Longer warning beeps when battery is critically low (repeats)

Warning beeps when battery is getting low (repeats)

low-RCS target / low-radar-cross-section target

low flying aircraft / low-flying aircraft

low-flying, low-speed drone

alarm button

alarm placement

alarm system

alarm unit

audible alarm

automatic chemical agent alarm

Doppler effect alarm

gas alarm / warning

radio alarm signal

WMD alarm (weapon of mass destruction)

air raid siren / alarm

fire extinguishing system sprinkler system and fire alarm system

antitank alarm

assembly formation after an alarm

fire alarm bell

fire alarm light

overflow alarm

visual alarm

circuit alarm

automatic-alarm receiver

emergency alarm system

failure alarm

false alarm

fire alarm