Acer H7550ST projects clear & wide images of up to 100 inches diagonally from as little as 4.9 feet (1.5M) from the screen thanks to short-throw technology, a high 3, 000 lumens brightness & a native 16:9 aspect ratio. Due to its ability to project a large picture from a short distance, its perfect for consumers who will be using the projector from the comfort of home for enjoying movies, games & karaoke, even within smaller rooms. Its also a great option for educators for projecting lessons in the classroom. For added convenience, a hidden adapter enables data to be transferred & projected wirelessly from a smartphone, PC or Chromebook leveraging users own Chromecast, an Acer MWA3 MHL dongle or Acer Wireless HD, which delivers 60 Hz Full HD 3D movies without having to change settings when used with a HDMI cable connected to a media player. The unique hidden design of the adapter furthers data security, while maintaining the projectors clean look & feel & reducing the possibility of it being lost. Two built in 10W speakers provide powerful sound, eliminating the need for external speakers. Deepening the audio impact, built-in DTS Sound increases loudness without escalating distortion, while improving bass performance & vocal clarity. In addition, Acer True Harmony, a customized equalizer, fine-tunes & optimizes the frequency balance to deepen the impact of movies, games & music with enhanced bass & multidimensional sound. The H7550ST can also stream audio to a wireless Bluetooth headset, sound bar or speaker for additional listening options. Plus, two audio ports extend the ability to attach additional speakers for a powerful surround sound experience. Acer Colorsafe II provides realistic visuals with its ability to reduce brightness decay & color shift to ensure long lasting color fidelity compared to other technology. In addition, Acer Color Boost 3D leverages an optimized 6-segment color wheel, powerful image processing & advanc