The latest of the Optoma projectors to be released is the PK301 model, which is a pico projector with a contrast ratio of 2000 to 1, 50 ANSI lumens and a resolution of 854 x 480. With 50 lumens, this is much better than what the initial models offered (just 8). The size is 4.7 by 1.2 by 2.7 inches and it has around half a pound. To get the most brightness, it has bright LEDs, though it also means that it needs a cooling fan to keep it going.