4 Channels Wireless Remote Speedlite Flash Trigger Universal for Canon SpeedLite 580EX II, 580EX, 550EX, 540EZ, 520EZ, 430EXEXII, 430EZ, 420EX, 420EZ, 380EX;Nikon SpeedLight SB-900, SB-800, SB-600, SB-28, SB-27, SB-26, SB-25, SB-24;Olympus FL-50, FL36;Pentax AF-540 FGZ, AF-360 FGZ, AF-400 FT, AF-240 FT;Sunpak Auto 2000DZ, 622 Pro, 433AF, 433D, 383, 355AFm 344D, 333D;Vivitar 285HV (Older Vivitar 285283 works only with PC sync cord)