Guide Number: GN60(ISO100,200mm) 
Wireless Flash: Optical pulse slave 
High-speed sync: 1/8000s 
Flash mode: ETTL/M/Multi 
Trigger mode: On-camera flash, Optical pulse transmission, Light trigger Flash coverage: 20-200mm (When using wide angle dispersion plate is 14 mm ) 
Slave flash: Optical pulse slave Canon (Manual mode), light trigger S1, S2 
Shutter sync: High-speed sync, first-curtain sync, second-curtain sync 
Flash exposure compensation: Yes, 1/3 gear incremental 
Flash exposure bracketing: Yes 
Flash exposure lock: Yes 
Modeling Flash: Yes 
AF Assit: Yes 
Manual Flash: 8 levels of output control (1/128~1/1), 1/3 gear incremental 
Frequency flash: 1~199Hz 
Recycle time: Quick flash less than 2s, ordinary flash less than 3s 
Optical pulse transmission distance: About 20m 
Optical pulse transmission channel: CH.1~CH.4 
Flash grouping: Support A/B/C flash group 
External Interface: Hot-shoe, PC sync interface, external charging interface 
Power supply: 4×AAsize batteries (Alkaline or Ni-MH is usable) 
Other functions: Custom function, overheating protection function, power saving mode, the voice prompt function 
Measurement: 79.7(L)×142.9(W)×125.4(H)mm 
Net weight: 420g (not including battery) 

Compatible list : 
Canon 1100D, 1200D,550D, 500D/T1i,350D, 600D,650D,700D,60D,70D,7D ,7DII,6D,5D II,5DIII (NOT suitable for Canon 1D II,1Ds II, 1D, 5D ) the applicable of other cameras need to test