HAHNEL VIPER TTL FLASH TRIGGER FOR CANON
Wireless Flash Trigger

Control up to three groups of flash guns, each group comprising of one or more flash units
TTL, Manual and Multi (Stroboscopic) mode control
LCD indicates user-friendly status of each group
TTL Pass Through - hot shoe on transmitter allows E-TTL speedlight's or other TTL systems such as Canon ST-E3 or Tuff TTL to be combined with the Viper DCM (Digital Channel Matching) to provide reliable connections
Over 100m range
microUSB socket for firmware upgrade
Compatible with original speedlights and the MODUS 600RT MK II & MODUS 360RT
Easily adjust mode and values on a group by group basis