Master Ad Public Company Limited, together with its subsidiaries, provides advertising services in Thailand, Hong Kong, and Vietnam. The company operates through two segments: Advertising and System Installation Service segments. The company provides street furniture comprising LED digital screens, light box; out of home media services for highway, city center, business area, and other spots; and system integration services for advertising and public transportation. It also provides media rental services; invests in advertising media; and distributes software and computer related products including system development, installation, and maintenance. The company was founded in 1988 and is headquartered in Bangkok, Thailand.