Thanks for all the helpful replies. I'm used to a Lunasix F where all the settings are clearly visible, and easy to change as necessary. The "digital watch" situation always catches me out. I have a timer at home and I have lost the instructions. No matter what combination of buttons I press, I cannot set the time. I am of the view, however, that a digital meter is now preferable to a moving needle type. I will look at the specs of some of the other current digital models. Thanks. Alex.