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 20 to 60 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.