The purpose of this study is to explore the competitive advantage of PT. Omudas Delapan Raya as a Digital-Out-of-Home device company to face the LED device industry in Indonesia. The digital advertising growth is rapidly increasing by 27.8% in 2018 as the industrial revolution 4.0 began, where business operations can rely on the interconnected network and data-based system. PT. Omudas Delapan Raya is an LED device company that has a competitive advantage in the form of products, prices, quality, and service. The factors that influence competitive advantage can be seen from several perspectives such as the owners, employees, and customers of the firm. This research is a single instrumental case study. The primary data is derived from respondents through in-depth semi-structured interviews, observations, and field notes. In addition, secondary data include firm documents. Subsequently, the researchers construct a mini-model theory denoting the factors that contribute to the competitive advantage of the company.