The Acer C101i is a portable DLP projector. The 30,000 hour lamp life will be sure to last you a very long time. This is an ideal portable projector with it only being 0.265KGs. There are also two built in 1W speaker for added audio. It offers a contrast ratio of 1,200:1, this means it will give your darker areas more depth and appear more defined. The C101i has the modern HDMI connection so you will be able to connect to modern sources through this. There are two ports.