The Optoma EH461 projector offers hassle-free and cable-free presentations using the USB stick and built-in office viewer. Perfect for business meetings and classroom lessons, this projector can also give presentations wirelessly from a mobile device. Featuring a wide range of inputs, from PCs to tablets, the built-in speakers give an output of 10W clear and loud audio. For ultimate control, the projector comes with RJ45, allowing you to monitor and control your network in multiple rooms. Featuring a contrast ratio of 2000:1 with a 1080p resolution and projected image size of 37.98m - 208.5m, the EH461 is also perfect for watching Blu-ray movies, HD broadcasting and playing video games.