Stay Focused on Storytelling, Regardless of the Situation. Be prepared for any adventure with the portable and incredibly efficient Elinchrom ELB 500 TTL Off Camera Flash. Combining 500 Ws of power with features including TTL, HSS, Active Charging, and Full Asymmetry all in a package weighing only 8lbs, this robust battery pack enables you to create freely in the studio, on location, or even on the move. Supplied without Li-Ion Battery or Flash Head, these items are sold separately or are available in kits, see listings for the Elinchrom ELB 500 TTL Off Camera Flash To Go Kit (EL10309.1) or Elinchrom ELB 500 TTL Off Camera Flash Dual To Go Kit (EL10310.1) for details Travel Light Weighing only 1.5lbs, the ELB 500 TTL's Flash Heads can be easily boomed out by hand or with minimal counterweight. The compact design eliminates the need for heavy-duty stands and enables the ELB 500 TTL to be comfortably worn by an assistant. And Stretch Your Imagination Achieve sync speeds of up to 1/8000ths of a second using High-Speed Sync to freeze motion with incredible sharpness, create a narrow depth of field, or overpower the sun. With Independent Remote Control of Up To Two Flash Heads Take full advantage of the ELB 500 TTL's fully asymmetric power distribution with an Elinchrom Skyport Transmitter Pro. Now you can independently adjust each head's power across their seven-stop range and control the modeling lamps from atop your camera. So You Can Master Your Workflow The ELB 500 TTL lets you compose images at the speed of life. Use TTL to set an exposure quickly and then use Manual Lock to switch to manual mode without losing your initial exposure for further adjustment or to explore creative effects. While Never Losing Momentum The ELB 500 TTL's Active Charging enables you to plug into AC power and charge the battery mid-shoot regardless of the batteries' charge level, making it perfect for an uninterrupted workflow.