1 Higher sync speed than the first generation The highest flash sync speed up to 1320 second some of models may only reach to 1250s or less difference combination of models of flash and camera using may achieved difference flash sync speed
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2 Adding the Locking rings
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3 Improved Flash Shutter control Buttons
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4 Working for more non CanonNikon cameras and single firing pin cameras ALL Standard Hot shoe DSLR Camera except Sony and Minolta
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5 Adding the power switch for single transmitter Set the power switch on TX single transmit or TRX transmitreceive automatic switch state according to different shooting requirement When it used as wireless triggering transmitter and flash testing set to
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