Acer K137 Portable Home Theater Projector (White) The Acer K137 is the perfect lightweight, compact projector. With a design that can fit in the palm of your hand, this projector provides great mobility and ease-of-use. This projector supports MHL connectivity (via an MHL/HDMI port), which means it can display uncompressed HDMI audio/video from any smartphone or mobile device that supports MHL. To enhance home entertainment experience, K137 is integrated with powerful 3Wx2 stereo, SRS sound effect speakers, users can fully enjoy the cinema-like performance at home.