The EL20677.2 is a ELC Pro HD 500 To Go Kit equipped with an OLED display for an easy and precise user experience the ELC Pro HD benefits from cutting edge technology. Recycling times are lightning fast at 0.6 seconds to full power while Swiss precision guarantees consistent power time after time, shot after shot. But hardware isn’t all. The software built into this unit gives you the freedom to configure the ELC to your individual style of shooting, for every application.