Compatible 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, built-in Flash C command and built-in wireless single of 7D/60D/600D, it realizes wirelessTTL and manual flash and stroboscopic flash. Supports High-speed Sync The YN568EX III can synchronize with all shutter speeds, realize TTL and manual flash, the maximum shutter sync is up to 1/8000. TTL Flash with High Guide Number GN58@ISO100，105mm, support TTL, M, Multi flash. Supports Firmware Upgrade The YN568EX III is equipped with the USB interface, you can download t Support the Battery Remaining Power Real-time Display The YN568EX III is equipped with the battery electric power display function, allows you to check the battery remaining capacity easily.