The Green Slim series is the perfect choice for customers looking to upgrade their existing installed projectors. The 2x optical zoom means that a Green Slim model will replace any installed projector seamlessly, without having to change the ceiling brackets. This will help to keep budgets under control & disruption to a minimum. The Green Slim series offers brightness level which is more than enough for even a large, bright classroom or meeting room. This product has HDMI connectivity, allowing users to present HD content for rich & vivid presentations. It's also light & portable, so that it can be moved easily between rooms.