Keep your audience engaged during presentations with the NEC NP400, a value-driven portable projector ideal for education and small-to-medium-sized business environments. This model delivers remarkably bright images and features easy-to-use networking technologies, high contrast and up to 4000 hours of lamp life (in ECO ModeTM). Whether in the classroom or boardroom, the NP400’s multitude of advanced technologies allows you to start up in seconds, connect with your audience and shut down with ease
The Optoma HD20 is a "classic" and small DLP projector. The small is handy if you aren't doing a permanent installation. It certainly is easy enough to carry outside, say, to use with an inflatable screen, or to shine on a garage door or hanging sheet. For most people though, the HD20 is a really nice first projector that will work just fine in a light controlled family room, or small dedicated theater room