B071P3RT7X Viper Wireless Group Flash Trigger/Receiver for Nikon

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Control up to three groups of flash guns, each group comprising of one or more flash units TTL & Manual mode
LCD indicates user-friendly status of each group Hot shoe on transmitter allows speedlights in manual mode to be used with the Viper TTL
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