Hahnel Viper TTL Transmitter for Nikon

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.