Specification: YN-565EX III, it's a upgraded flash, compared to the second version YN-565EX II, we added some new functions: ?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. ?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. ?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. ?TTL Flash with High Guide Number GN58@ISO100,105mm, support TTL, M, Multi flash. Suitable Camera and Flashes in Wireless TTL Slave mode: Camera: Canon 7D, 60D, 600D Flash: Canon 580EX II, Nikon Nikon SB-900, SB-800, SB-700 Suitable Camera in TTL function: Canon 5D, 7D, 6D, 7DII. 30D, 50D 450D 500D 550D 600D 650D 700D 750D 800D 1300D 1200D 1100D 1000D Canon Rebel XS XSi XTi T1i T2i T3 Suitable Camera in S1 / S2 mode: Any DSLR camera with standard hot shoe Suit for Yongnuo YN622C, YN622C II, YN622C KIT Package including: 1 x YN-565EX III for Canon 1 x Mini Stand 1 x Manual in English and Chinese 1 x Original box ( with black protecting bag and wrapped by air bubble sheet )?Additional Function?Supports Firmware Upgrade; Sound Prompt System; Equipped with the AF-assist Beam Emitter; Supports automatic and manual zooming, the focal length can be varied between 24 to 105mm. YN565EXIII can be triggered by the camera set-top, PC synchronization trigger and wireless optical trigger off the camera. Automatic Settings Saving, supports custom settings (Fn). ?Support the Battery Remaining Power Real-time Display? YN565 III is equipped with the battery electric power display function, allows you to check the battery remaining capacity easily. ?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 YN 565EX III can respectively accept the master unit of YN600EX-RT II, YN568EX II, YN-568EX III; Canon 600EX (II)-RT, 580EX II; Nikon SB910, SB900, SB800, SB700, Nikon internal flash and Canon commander and wireless signal of 7D, 60D, 600D, realizes external TTL and manual flash and stroboscopic flash. ?High Guide Number, Supports TTL HSS?GN58 @ ISO100, 105mm; YN-565EX III support TTL, M, Multi flash and High-speed Sync (HSS). The maximum sync speed is up to 1/8000s.