BenQ projector mx8 15st is expensive because of its good quality and good experience. BenQ MX8 15ST Plus is a projector with DLP projection technology, specially designed for education, with high brightness of 3000 lumens, 13000: 1 super high contrast. Built-in 10W high-power speaker, equipped with advanced integrated dust-proof design and intelligent power-off protection function, can well adapt to the harsh use environment of rural schools in China. In terms of function, workmanship and resolution, it is the most cost-effective projector.