In wisdom parking industry, nantong ring set is implemented parking lot & other;Unattended & throughout;System development and application, in the parking lot entrances unattended installation calling system, pendant let owner can not through the parking lot staff help, unobstructed into the parking lot, car owners through electronic payment system and self-help pay cost machine can complete parking payment process, compared with before, parking efficiency improved a lot.What’s the advantage of the unattended parking system?