YONGNUO YN565EX III TTL Flash Speedlite For Canon (Black) Features 1. 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. 2. 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. 3. Support the Battery Remaining Power Real-time Display: The YN565EX III is equipped with the battery electric power display function, allows you to check the battery remaining capacity easily. 4. Compatible With C Optical Transportation Wireless Slave Flash One YN565EX III can respectively accept the master unit of YN600EX-RT II, YN568EX III, YN568EX IIII, 600EX(II)-RTI, 580EX II, SB910900800700, For Canon commander and wireless signal of 7D60D600D, realizes external TTL and manual flash and stroboscopic flash. 5. TTL Flash with High Guide Number: GN58 ISO100, 105mm, support TTL, M, Multi flash. 6. Sound Prompt System: When the sound prompt system is enabled, different sound modes will prompt different working conditions of the speedlite so as to allow you to focus on shooting process. 7. Equipped with the AF-assist Beam Emitter: The YN565EX III is equipped with the AF-assist beam emitter, allows you to focus easily in dark environment. 8. Supports Electric Zooming (24-105mm): Supports automatic and manual zooming, the focal length can be varied between 24-105mm. 9. Multiple Trigger Mode Supported: YN565EX III can be triggered by the camera set-top, PC synchronization trigger and wireless optical trigger off the camera. 10. Automatic Settings Saving,supports custom settings (Fn): Equipped with Large-size LCD display and standard 2.5mm PC interface Specifications 1. Product Model: YN565EX III 2. Circuit design: Insulated Gate Bipolar Transistor (IGBT) 3. Guide No.: 58(ISO 100, 200mm) 4. Flash