Voeloon v600(oloong sp690ii) digital camera accessory flash speed light Description: 1) support nikon i-ttl(ttl: 24mm-180mm;gn:35) 2) compatible with nikon wireless creative lighting system(master/slave mode) 3) stroboscopic system 4) fast recycling time 5) large capacity electrical storage system 6) sound monitoring system 7) high-definition lcd and led backlit 8) xenon lamp overheating protection system 9) high-temperature insulation 10) metal mounting foot 11) auxiliary focus system 12) light lead flashing system 13) iso9001 & iso4000 14) advanced application;you can set exposure compensation¡¢exposure bracketing¡¢front/rear-curtain sync of external flash, and it supports red-eye reduction flash mode¡¢fv lock¡¢power saving mode.