I have used this flash (CANON/NIKON/FUJI/RICOH - some models) in both master and slave modes, and have confirmed its operation. I am selling it as part of a gear clear-out, as I own multiple units. In addition to the standard accessories such as the carrying case and original box, a diffuser for the TT600 and other accessories included at the time of purchase (all unused) are also included. Please refer to the photos for further details. Please note that shipping may take longer than usual during the New Year's holiday period, but I will do my best to ship it as quickly as possible. Thank you for your understanding.