Buy from Amazon.com : http://fave.co/1MMeniM <br /><br />EboxDeal Yongnuo 1 x YN-622C-TX 2 x YN-622C RX E-TTL LCD Wireless Flash Controller Wireless<br /><br />Product Description : <br />The distance is 100m with 6 channels and the Max Sync Speed reaches 18000S <br />Can support TTL Ratio USB Firmware Upgrade AF Assist Beam Emitter <br />It has 3Groups ABC and Sync mode 1st-curtain 2nd-curtain High-Speed SyncHSS <br />Flash mode GRE-TTLII manual Super SyncE-TTLIIMulti flash <br />Weight 82g and shutter release interface is 25MM Shutter release interface
