RM-S1AM Timer Remote Shutter Release for Sony RM-S1AM Commander Alpha A100 A200 A300 A350 A500 A550 A700 A850 A900 Full functions supported as the camera shutter switch (with halfway or complete pressing) Design for group, macro, long exposures, continuous, motion shooting, etc timer delay: 0s to 99hrs 59min 59s in one-second increments Exposure time: 0s to 99hrs 59min 59s in one-second increments;Exposure count: 1 to 99. Interval: 0s to 99hrs 59min 59s in one-second increments