[Closed] Projector for a computer - which one?

For work, need a projector to link up to a Mac to present (short films, vox pops, keynote presentations, watch the World Cup!) - small and portable, quiet, decent visual quality, sound not needed … done some Googling but no idea and options are limitless. Ideally less than £250 but don't know if that'll get anything decent?

Any pointers of what to look for, brands to go for, budget range etc? I know it's a really open-ended question but don't want to waste money on something useless, and likewise, don't want to overspend.

Thanks