Di600 has a wireless remote flash system as a slave unit.
You can enjoy creative flash photography with multiple lightings from the various directions. There are 3 slave modes provided.
Slave Digital (SD): Di600 synchronizes to the pre-flash system. The master flash is to be set at TTL (E-TTL for Canon, i-TTL for Nikon and ADI/ P-TTL for Sony) mode.
Slave Film (SF): Di600 synchronizes to the traditional single flash system. The master flash is to be set at manual mode. Studio lighting system synchronizes to this mode. This mode is also available for open flash, and for a standard flash in the market.
Wireless TTL: Di600 synchronizes to the wireless remote flash system. The master flash is to be set at Channel 1 group A in wireless remote mode.