[ ROHS CE ] VILTROX JY-680Ch 1/8000S High Speed Sync HSS ETTL TTL Flash Speedlite for Canon DSLR 760D 750D 700D 650D 600D 70D 60D 5DII 7D GN58 Supports Hight-Speed Sync Flash,, up to 1/8000 second Canon wireless flash system (master/slave),Wireless TTL Slave for Canon GN58@ ISO 100, 105mm; which reaches the level of the mainstream hot shoe flashes, supports HSS, TTL/M/Multi mode. Auto and Manual Zooming Head 24 C 105mm,supports full-frame/half-frame camera 2.5mm PC Synchronous Interface It makes things easier on lightening the flashlight synchronously by using PC synchronous line.