IMZ&reg; Wired Remote Shutter Release Cable Cord (Replaces RM-S1AM) for Sony Alpha A99 A77 A65 A58 A57 A350 A500 A550 A560 A580 A700 A850 A900 A55 SLT A57 A37 A55 A65 A77 Cameras 100% Compatible with RM-S1AM Shutter Release. No batteries are required Great for studio, Night shooting, and Long time explosure Use for Continuous or Single Exposures User Manual Included. 100% Satisfaction Guarantee.