Yongnuo RF-603II RF-603 II c1 Wireless Flash Trigger Shutter Release Sync Speed Up To 1/320s for Canon 1100D / 1000D / 700D / 650D / 600D / 550D / 500D / 450D / 400D / 350D / 300D / 60D

Higher sync speed than the first generation --- The highest flash sync speed up to 1/320 second (some of models may only reach to 1/250s or less, difference combination of models of flash and camera using may achieved difference flash sync speed). Working for more non Canon/Nikon cameras and single firing pin cameras --- ALL Standard Hot shoe DSLR Camera except Sony and Minolta. Adding the Locking rings Adding the power switch for single transmitter --- Set the power switch on TX (single transmit) or TRX (transmit-receive automatic switch) state according to different shooting requirement. When it used as wireless triggering transmitter and flash testing, set to "TX"; When it used as wireless triggering receiver, using shutter release or other extended functions, set to "TRX". set to OFF means turn off the power. Improved Flash / Shutter control Buttons