The Elinchrom D-Lite 4 IT Head is the upgraded version of the previous D-Lite 2, with the IT standing for intelligent triggering. It has a built in EL-Skyport Receiver so there is no need for having a cable plugged in to your camera to fire the flash. The Elinchrom D-Lite 4 IT Head is compatible with the ELS and Eco transmitter. With synchronisation of up to 1/250s with the Eco transmitter you'll never miss a shot, and an in-built cooling fan will keep it nice and cool. The Elinchrom D-Lite 4 IT Head is a great entry level flash, it is also available in a To Go set.