Ключевые слова: 911, alarm, ambulance, announce, art, background, blue, bullhorn, button, contour, danger, department, design, emergency, fire, flat, glowing, help, icon, illustration, isolated, light, line, linear, lineart, loud, loudspeaker, medical, message, mobile, neon, outline, phone, police, red, rescue, safety, service, sign, smartphone, sos, speaker, speech, support, symbol, telephone,