Made exclusively for the ELB 500 TTL battery-powered pack, the ELB 500 TTL Flash Head from Elinchrom has a compact form factor of 3.5 x 3.1 x 6.3" and weighs just 1.5 lb making it ideal for hand-holding or mounting overhead on supports such as a boom. Its Quadra front accessory mount (Q-Mount) is compatible with Portalite softboxes, and can also use full-sized Elinchrom or Profoto softboxes with an optional adapter. The flash head is capable of achieving flash durations as short as 1/3400 sec. in Normal Mode and 1/20,000 sec in Action Mode for special effects. It has a 14W LED modeling light that draws minimal power from the pack's battery, a 5/8" receiver for stand mounting, and comes with an 8' cable for connection to the ELB 500 TTL.