I'm very satisfied with the device, only a small point, I find negative and that the memory not the day and time was indicating when measured, had previously found an instrument that has done this since I lack for me personally a table must perform my very, you should always try though at the same time to measure, but sometimes this is not possible, then lurches to be remembered always by and tried the values assigned times ... but that's OK, really is not necessarily the problem, device is working properly!