This stopwatch is about 2 years old, and the time still works (but I don't know for how much longer it will) of course, has the stopwatch function, also keeps time (like a watch) has the date, the month number and day of the week, but sadly, has no instructions. I lost the box long ago, and set the time and date through trial and error. I also THINK it has an alarm, (don't quote me on that) If and when the batteries go out, there are 4 VERY small phillips head screws on the back to open the watch to replace them. I just want someone to have this watch that will have a use for it, since I (obviously) don't.