This is very sophisticated data back that can do the following:

• Print either the year/month/day, month/day/ year, day/month/year, or day/hour/ minute in orange-colored numbers on the slide or print.
• Print numbers from 000001 to 999999
• Release the camera shutter at preselected intervals and allows for time-lapse photography (an 'intervalometer').
• 24-hour clock with alarm clock feather.

In full working order.