LCD Yongnuo MC-36b C1 Camera Timer Control Shutter Remote Cord for Canon &Pentax Canon EOS 60D, 600D, 550D, Pentax K20D, K200D, K10D, K100D Design for group, macro, long exposures, continuous, motion shooting, etc. LCD panel can be illuminated. It allows you to take time exposures up to 100 hours long. Full functions supported as the camera shutter switch( with halfway or complete pressing). Exposure time: 0s to 99hrs 59min 59s in one-second increments.