● build-in 2.4G system ● bowens adaptor ● 4Ws-500Ws,8stage ● 1/1-1/128,1/8000HSS ● TTL mode,auto identity for cannon,nikon and sony ● recyle time 0.2-1.8s ● continuous shootng mode(10 shoot per second),action mode and constant color mode ● 56GN(ISO 100 1M) ● 4000mAH(59.2Wh)battery capacity,number of flashes at full power after full charge 400 ● flash duration up to 1/22000