This wireless shutter release has strong anti-interference function and has 16 channels for you to choose. 

It is extremely useful if there are several photographers working nearby. 

Each photographer could choose their own channel to trigger off the shutter release of the camera they are going to use without triggering others’ because of overlapping signals. 

You also can control more cameras with the channel switches on the transmitter and the receiver, and extra receivers if you need. 

Compatible with: 
Canon: EOS 450D, CANON EOS 400D, CANON EOS 350D, CANON EOS 300D, CANON EOS 300, CANON EOS 300V, CANON EOS 50E, CANON EOS 50, CANON EOS 33, CANON EOS 30. 
Pentax: K10D, K100D, K20D, K200D, K110D, K100D, Gx-1L, *ist D, DS, DS2, DL, DL2, K10, MZ-6, MZ-L, ZX-L. 
Hasselblad: H, H1, H2, H2D, H1D. 
Contax: 645, Nl, Nx, N, Digital. 
Samsung: GX-10, GX-1L, GX-1S.