To appreciate the Hitachi CP-A52's key advantage you have to understand what "ultra short throw" means. Simply put, it refers to a projector's ability to create a large image from a short distance. How large and how short? The CP-A52 can project an image five feet across diagonally from just 4" from the screen. That's not a typo. A 100" image (the largest recommended although the projector can go to 200") can be projected from just 16".
This ultra short throw capability makes this projector ideal for ceiling mounting in a classroom. Presenters don't have to worry about projector light in their eyes and shadows blocking the show are a thing of the past.
If a presentation has a soundtrack your audience can listen via the built-in 7 watt speaker or optional external powered speakers. The CP-A52 also can also display the whole gamut of closed captioning (CC1, CC2, CC3, CC4, T1, T2, T3, T4) from programming sources that provide it. You can even set CC to come on automatically when the Mute button is pressed.
To protect your investment there's both a security bar, through which you can thread an antitheft cord up to 10 mm in diameter and there's also a slot for a Kensington Lock. Whether you're watching HDTV, a Blu-ray disc, or giving a PowerPoint presentation (all from external equipment sold separately) if you need a big picture in a small space CP-A52 is for you.