The ELB 500 TTL To Go Kit was put together for photographers who require a small form factor, light weight and superlative performance backed by the convenience of TTL exposure control. The kit includes a 500Ws ELB500 TTL pack with a lithium-ion battery, charger, and sync cord. An ELB 500 flash head with 8 cable, a 7" Q-Reflector, Snappy Carrying Bag with shoulder strap, and a sturdy, nylon ProTec Location Bag with protective rain cover are also included. The ELB 500 TTL is an incredibly portable and powerful battery pack combining 500Ws of power with a feature set including TTL, HSS, Active Charging, Full Asymmetry with built-in Skyport designed to empower the workflow of portrait photographers both in studio and on location. Measuring 16 x 18 x 9 cm and weighing just 2.5 Kg, the ELB 500 can be used with an optional Elinchrom Skyport Pro or the Phottix Odin II transmitter. The ELB 500 TTL greatly reduces setup delays, shortening the time between inspiration and execution by using your cameras flash exposure system. With asymmetrical power distribution over 7 stops to 2 ELB flash heads, photographers can make TTL power adjustments at distances from 328 to 656 depending on the transmitter used. Theres also a Manual Lock mode that allows you to get a TTL initial exposure "lock", and subsequently switch to manual mode to fine-tune exposure. The ELB 500 TTL is ideal for photographers in time sensitive shooting situations where the speed of TTL lets them capture fast-breaking images or for those who simply prefer the convenience of TTL. The packs Manual Lock functionality allows photographers to get an initial "lock" on their exposure in TTL and then switch to manual mode to further adjust their exposure as they need or to explore different creative effects. The ELB 500 TTL features a built-in Skyport receiver, Elinchroms reliable and easy to use wireless system. Existing Skyport Plus HS for Canon and Nikon owners will be able to upgrade their transmitters to work with the ELB 500 TTL via a firmware upgrade with more brands to follow. Via their ongoing technology alliance, the ELB 500 is also compatible with the Phottix Odin II protocol. This lets a photographer trigger and control virtually any light or combination of lights in their collection with either Elinchrom or Phottix transmitters right from their camera. The ELB 500 TTL is powerful enough to overpower the sun, delivers 400 full-power flashes on a single charge and has a fast recycling time of 2 seconds at maximum power. The ELB 500 head is smaller than a speedlite yet delivers 10 times more power. It is lightweight enough to be mounted on a camera bracket or boom arm while on location.