N Square where messages can be exposed along the lines of users at the platforms, waiting rooms, and transfer passages of the core stations of Seoul subway lines 1 to 8.

There are four types of sizes and the venti is 7m x 2.5m wide.

A total of 54 stations and 120 units are installed, and at least 120 times transmitted based on 15-second materials for 19 hours a day.

The price for the simultaneous operation of 54 stations and 120 units is 2 million won per day (ex VAT)- It can also be proceeded in individual stations.

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