Neewer PRO-6C 2.4G 15 Channels Professional Wireless E-TTL High Speed Sync HSS 1/8000s Flash Trigger Transceiver Kit for Canon EOS 5D Mark II/5DMark III/1Ds Mark III/1D Mark II/1D Mark III/1D Mark IV/7D/10D/20D/30D/60D/50D/300D/350D/650D/600D/550D/500D/450D/1100D/1000D/EOS M DSLR Camera, Canon 600EX(RT)/580EXII/430EXII/320EX/270EXII