2.4G Wireless TTL Speedlite Large-size LCD display AF-assist Beam Emitter Automatic Settings Saving,supports custom settings (Fn) YONGNUO YN565EX III for Canon Flash Supports Firmware UpgradeHigh Speed Recycling SystemGN58 High Guide Number Supports Firmware Upgrade The YN565EX III is equipped with the USB interface, you can download the latest firmware from YONGNUO official website to upgrade the speedlite. High Speed Recycling System The recycling time for full output just takes 2 seconds; you can get high speed current-return experience even without using brand new batteries, which will only takes 3-4 seconds. Compatible With C and N's Optical Transportation Wireless Slave Flash One YN565EX III can respectively accept the master unit of YN600EX-RT II、YN568EX II、YN568EX III、600EX(II)-RT、580EX II、SB910/900/800/700,Nikon internal flash and Canon commander and wireless signal of 7D/60D/600D,realizes external TTL and manual flash and stroboscopic flash. Package Including: 1 * YN565EX III for Canon Flash Speedlite1 * Manual in English and Chinese