E-TTL, E-TTL II CompatibleGuide Number 24mm: 78.7'/24m @100 ISOBuilt-in LED lightVersatile vertical and horizontal bounceWireless Slave for 3 Groups & 4 ChannelsExtend/Retract Flash Head...
2.4 GHz Wireless Radio Transmission
Compatible with Canon E-TTL / E-TTL II
Guide Number: 197' at ISO 100 and 200mm
Zoom Range: 20-200mm (14mm with Panel)