Professional appearance design for ventilation has largely improved the stability and lift time for the projector. The LED lamp can works for over 20 thousand hours , and can provide beautiful colors. Manual focus adjusting, get picture from 10 to 80 inches. Professional trouble shooting and protection measures. Then projector is small and light, easy to carry with. Easy changing in 16:9 and 4:3 aspect ration. Low power consumption, ehco-oriented. Multifunction interface: AV/VGA/SD/ USB/HDMI. Support Mobile phone with MHL to HDMI function. This product comes with the 8 GB sandisk pendrive, which could be used to store data and used while viewing things on the projector.