Whenever you purchase a product, you have the right to expect that it should come with instructions, right?? Well, this one doesn't!! It's not just a one-off either: the first timer looked second-hand & didn't have any instructions. I complained to the vendor, but I found them on the net before he replied.
I really wanted to use the 'random' function, as indicated in the specification. OK, the instructions that I downloaded let me access this function, but it didn't work as described, so I sent the timer back. After waiting a week & a half, another one arrived, STILL without instructions. This one worked a bit better than the first one, but the random function is a load of garbage: It works once per programme (if at all). If this is what they call random, I would like to know what they call predictable!!
The rest of the timer is easy to programme & works fine, so if this is what you want it for, then go-ahead & buy it. Just don't expect any instructions with it.