So two instruments have ordered for comparison. A few words about it: it does exactly what it should and would highly recommend it. I just settled on an alternative device, because the other device see the inserted duration leaves (minutes, hours, days). With this device, you have to remember when you took it into operation! But as I said, is running. Convenient if you can unpluging it to the display thanks to battery-read. That was not in the alternative device ;-(
