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 and 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 and vivid presentations. It's also light and portable, so that it can be moved easily between rooms.