Acer has recently presented a new Pico Projector codenamed Acer C20 which is pretty small and has the size of a smartphone.

Specification-wise the Acer C20 comes with a slot for microSD memory cards, as well as a USB port that can playback files directly from a flash drive. The contrast ratio is set at 2,000:1 while the maximum WVGA resolution is 66-inches and there are 20 lumens of brightness. Other details include USB and HDMI connections, a battery that can last 2 hours, and a price tag of approximately $430.