warning of air conditioner,smoking ban or non smoking sign on airplane,light on aircraft,seat belt,selective focus

air aircraft aircraftseat airline airplane airplanelight airport announcement background ban belt beltselective board button cabin caution cigarette close closeup concept conditioner conditionersmoking fasten flight fly focus inside interior light non overhead passenger people plane protect protection remind risk safe safety seat seatbelt seated secure security sign signage smoking symbol transport transportation travel trip warning