Powerful Guide Number of 78 (feet, @ ISO 100), full E-TTL control and E-TTL features including FEL, Hi-speed sync, and FEB. Full E-TTL automatic flash control with compatible EOS bodies, including EOS-1D, D60, and D30 digital SLRs. Incandescent focusing lamps, and two different types of 1-second modeling flash allow easy focusing and previewing of lighting effects.
Compatible w/ all EOS cameras. E-TTL II w/ EOS-1D X Mark II, 1D X, EOS-1Ds Mark III, 1Ds Mark II, 1D Mark IV, 1D Mark III, 1D Mark II N, 1D Mark II, 5DS, 5DS R, 5D Mark IV, 5D Mark III, 6D, 5D Mark II, 5D, 7D Mark II, 7D, 80D, 70D, 60D, 50D, 40D, 30D, 20D, Rebel T6s, Rebel T6i, Rebel T5i, Rebel T4i, Rebel SL1, Rebel T3i, Rebel T6, Rebel T5, Rebel T3, Rebel T2i, Rebel T1i, Rebel XSi, Rebel XS, ELAN 7NE, 7N, Rebel T2, EOS M3, EOS M. E-TTL w/ EOS-1v, 1Ds, 1D, 10D, D60, D30, Digital Rebel XTi, Digital Rebel XT, Digital Rebel, D2000, ELAN 7E, 7, IIE, II, Rebel Ti, K2, 2000, G, GII, IX, IX Lite.
|Mount Type||Controller mounts on Hot Shoe, Flash mounts on lens|
|Guide Number||72' (22 m) at ISO 100 (with both heads firing at full power)|
|Maximum Recycle Time||4 seconds|
|Cordless Ttl Control||no|
|Power Source||(4) four AA batteries|