YONGNUO Camera Flash,Firmware DSLR Camera Sync USB Firmware Speed Sync Master Slave III Wireless TTL II II Master Sync US Warranty E-TTL Speedlite Master Cameras Speedlite Master Wireless

matching with C and N's optical transportation wireless slave flash.. suitable with C and N's optical transportation wireless slave flash: --One YN568EX III can respectively accept the master unit of YN600EX-RT II, YN568EX II, YN568EX III, 600EX(II)-RT, 580EX II, SB-910/900/800/700, internal flash and commander and wireless signal of 7D/60D/600D, realiszs external TTL, manual flash and stroboscopic flash. Multiple trigger modes, automatic settings saving and custom setting supported. Equipped with large-size LCD display and 2.5mm PC interface, and supports the battery remaining power real-time display, convenient to use. Supports firmware upgrade: --The YN568EX III is equipped with USB interface, you can download the latest firmware from official website to upgrade the speedlite. Supports C's optical transportation wireless master flash; suitable with C and N's optical transportation wireless slave flash