Product review (1 stars): Not worth a dime
Got this unit and inserted a battery. Could hardly read the display. i figured the one then sent was old, so I inserted a new battery, still a display that you could only read part of the letters.  I reset the unit and it worked for a second, then same problem.  It DOES NOT function like the instructions say. They say press the on off button and the unit will go off  IT does not. you have to hold that button. It says you can reset the values by holding the min max button and you will see a "dash" . It does not do that, you have to insert a pin on the back to reset it..
Now, after all that, it still has a poor display that can not be read and fades in and out..
I would not waste your money, like i did