RF-603 II, the manual Flash trigger and shutter release ( you can use those two functions simultaneity ), it adopts a global free FSK 2.4GHz wireless channel which can be suitable in many countries. RF-603 II with FSK system, can be more effective to guarantee speed, distance and stability. Within capacious areas, the remote control distance may reach to 100m, and is suitable for the first generation RF-603.Suit for first generation, you can use them together.
-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).
-Adding the Locking rings
-Improved Flash / Shutter control Buttons
-Working for more non Canon/Nikon cameras and single firing pin cameras --- ALL Standard Hot shoe DSLR Camera except Sony and Minolta.
-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.
FSK 2.4GHz wireless remote sustem
Half-way press, Full-way Press
one is standard PC socket for flash Speedlite or studio Strobe