Ключевые слова: alarm, alert, background, burglar, ceiling, crime, danger, detector, digital, domestic, electronic, electronics, equipment, home, horizontal, house, indoors, infrared, insurance, interior, intruder, ir, motion, movement, object, office, pir, prevention, privacy, protection, red, risk, room, safety, security, sensor, sign, symbol, system, technology, thief, unit, wall, warning, white,