The MX717 boasts an ultra-high contrast ratio of 5300:1, defining images with razor-sharp details & refining them with a broad range of subtle color differences. Whats more, with a contrast ratio this high, text is sharper, cleaner & easier to read. The MX717 features two built-in 10 W speakers to help enrich your presentation with finest top quality audio performances. These speakers are sealed & secured within the projector housing by Ben Qs anti-shake design to ensure projection stability at all times.