Summary: The Sony VPL-EX4 Data Projector is priced on par for what it delivers. Designed for class rooms and small organisations, it has some standout features like password protection, panel key lock, low fan noise and a short-throw lense.
Pros: Good resolution and brightness, Security functions prevent unauthorised access, Low fan noise and well placed exhaust
Cons: Lacks an additional card reader slot, DVI port omitted, Not the smallest projector around
Excerpt: Projector Reviews The Sony VPLEX4 projector is the entry level XGA unit in the sony business range. The EX4 offers an XGA resolution 2200 lumen brightness (fine for an artificially lit room) and a fairly portable 2.9kg.