La description

●  Auto exposure TTL (I-TTL For Nikon, E-TTL II For Canon)
●  High Speed Sync 1/***0S
●  Built in Photographic lamp(can be a son flash)
●  Support wireless remote shutter release control
●  Compatible with Canon/Nikon wireless flash system(as master and slave, can exposure when as wireless master)
●  GN*0(ISO**0, *0mm);GN:*3(ISO**0, *4mm)
●  Manual zoom:****0mm(Retractable flash head)
●  Fast recycle time: 2S(Ni-Mh battery)
●  F1/F2 optical flash mode