High resolution presentations Project bright Full HD 1080p images with the DH351. Perfect for classroom and meeting room presentations, this projector is designed to be used at any time of day. Additionally, it boasts ease of use with its single HDMI connection and built-in speaker. You can even use the USB power to connect and power HDMI dongles such as the Google Chromecast.Full HD 1080p1080p resolution gives you sharp and detailed images from HD content without downscaling or compression; perfect for watching Blu-ray movies, HD broadcasting and playing video games. Amazing colours Give powerful presentations and educational lessons with stunning colours. Optoma projectors provide reliable colour performance suitable for any content and environment. From accurate sRGB colours for lifelike images to vibrant punchy presentations. We have a display mode to specific meet your needs. Perfect for a range of graphic and video presentations. Superior contrast Add more depth to your image with a high contrast projector. Compared to competing technology, Optoma DLP projectors provide you with brighter whites and ultra-rich blacks, images come alive and text appears crisp and clear - ideal for business and education applications. Full 3D Optoma projectors can display true 3D content from almost any 3D source, including 3D Blu-ray players, 3D broadcasting and the latest generation games consoles. Integrated speaker A powerful built-in speaker provides exceptional sound quality and an easy setup without the need for costly external speakers. USB-Power Use the USB-A port to power an HDMI dongle, such as Google Chromecast. Auto power off There may be instances when the projector is left running when not in use. To help save energy, the "auto power off" feature automatically turns off the projector after a set period of time if it is not being used Direct power off Power off your projector immediately or directly at the mains. This means you don''t have to wait for the projector to cool down before turning it off. Quick resume This feature allows the projector to be instantly powered on again, if it is accidentally switched off.