The indra 500 TTL is the next generation of phottix's innovative TTL products. The indra gives photographers 500w of TTL power. Most studios lights work only in manual camara modes, this limits their use in fast- moving environments. Using the intra battery pack, the phottix Indra 500 TTL is the perfect on location light with recharge times of 2 seconds and 400 full-power flashes when fully charged. It's small and extremely powerful. In the studio, using the Indra AC adapter, the phyttix Indra can fully recharge in 1 second.