The W309ST is feature oriented projector, specially designed for business & education environments. This bright short throw projector has precision optics with an bright light source engineered to handle ambient light conditions. Essential capabilities such as USB (Universal Serial Bus) power & network connectivity for more flexible operations are included. Short Throw Projector The W309ST offers big image in tight spaces, creating 100 inch projection images from just 1.1 meters away. More Effective Short throw projectors can be set close to the wall & eliminate the shadows, are the best solution for presentation scenarios. Bright 3800 lumens The best choice in medium-sized spaces with Optoma’s W309ST. Perfect for lights on viewing & a vibrant picture for all conditions. High Contrast Add more depth to your image with outstanding colors & exceptional black & white contrast performance. The image comes alive & text appears crisp & clear. Long Lamp Life Up to 15000 Hours With the specially calibrated ECO+ mode, you can reduce the power consumption by up to 70% & enabling a longer lamp life of up to 15000 hours meaning a very low total cost of ownership. 16:10 Aspect Ratio This projector has a 16:10 aspect ratio, & is the most commonly used with the latest WXGA or WUXGA notebooks. Powerful 10W Speaker A powerful integrated 10W speaker on this projector allows your content to be heard clearly & is easy to set up without the need for costly external speakers. USB (Universal Serial Bus) Power The built-in USB (Universal Serial Bus) power output (5V/1.5A) can be utilized to provide power for your streaming dongles such as Chromecast, HDCast Pro, or mobile devices. Charge your mobile devices simply by plugging in your USB (Universal Serial Bus) charging cable. Split Screen (* Optional) With an optional HDCast Pro dongle, it can be wirelessly connected to your laptop, tablet or mobile device & share your streaming videos, photos or documents to the big screen. Especially designed for business & education environments, up to 4 computers can project the content simultaneously. Low Noise Quieter than a Whisper, only 28d B noise in Eco mode.