Pixel RW-221 / S1 Wireless Remote Shutter Release for Sony Alpha A900, A850, A700, A550, A35 SLT, A37, A57, A65, A77, etc. - as RM-S1AM (Electronics)
I had a previous model of this remote trigger. That was a very good thing, but this development is just wonderful. Very wide scope, without telescopic antenna, function recommended from all directions without flaws Absolutely. The price is right too!