The Gratical Eye SDI electronic viewfinder is Zacutos smallest and lightest Micro OLED product. It is small enough to fit in the palm of your hand and weighs only 14oz. This SDI EVF solution is ideal for filmmakers who use professional cameras and external batteries. It has a single SDI input and a two-pin Lemo power jack. The Gratical Eye can run for 14 hours on a 75Wh battery!