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The Optoma S334E projector is brilliant for the mobile presenter with HDMI connection. The basic SVGA resolution is perfect for presenting text and simple graphics. I would not recommend it for movies as the image will not be as clear, so go up a resolution to XGA for an extra £30 if your budget can afford it. The Optoma projector has a good lamp life of 10,000 hours is Eco mode. Just Projectors review on the Optoma S334E The brilliant contrast ratio means the Optoma S334E will show even the darker images in more detail. It will produce radiant colours due to the brightness of this projector; it will be able to cope with bright rooms so you will not have to worry about closing the curtains or turning the lights off. This projector has a HDMI input which is great as you can connect to HD sources. It also has USB for PC-free presentations. As a low cost projector, this is ideal for simple PowerPoint presentations and simple images but not much more than that. 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. Check out the PDF to the left for more detail. What Optoma say about the S334E Project bright vibrant presentations effortlessly any time of day. Designed for meeting rooms and classrooms, the S334e boasts amazing colour, long lamp life and energy-saving features to provide you with a low overall cost of ownership. This projector is easy to connect to with multiple inputs, a built-in speaker and USB Power. Perfect for connecting HDMI dongles such as the Optoma HDCast Pro and the Google Chromecast or a laptop, PC or Blu-ray player for clear projected images with sound. Portable and lightweight projector can be installed or taken on the move for off-site meetings with the optional carry bag (sold separately). Eco+ technology brings together high contrast, improved lamp life and energy saving features that are easy to use while reducing power consumption. Using the specially designed lamp modes, you can reduce the power consumption by up to 70%. Each mode also has a positive effect on the lamp life, while lowering the total cost of ownership and reducing maintenance. This feature allows the projector to be instantly powered on again, if it is accidentally switched off. Stay in control of your presentation with Eco AV mute. Direct your audience's attention away from the screen by blanking the image when no longer needed. This also reduces the power consumption by up to 70%, further prolonging the life of your lamp. The projector will start up instantly when power is supplied to the unit. This eliminates the need to manually turn on the projector via the remote control or the keypad, ideal for use in rooms with a “master” power switch. 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. 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.