Check out the Hahnel Viper TTL Wireless Transmitter for Canon’s Key Features
(Hahnel CHLVIPTRANSC)
Hahnel’s Viper TTL Transmitter, coupled with the Viper Receiver (not included) allows users to remotely trigger their flash unit. Multiple receivers will work with a single transmitter, meaning you can trigger multiple flashes at once. The Viper TTL Transmitter offers full wireless connectivity with the Hahnel MODUS 600RT Speedlight.
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