Barring two flaws, this product would have received all five stars. The display can be difficult to read in low light conditions. No worse than a backlit display. The instructions for changing modes are confusing as you have to experiment before reading the instructions. It is enough to hold down the save button for three seconds to find out what you want. However, these disadvantages are of secondary importance in the overall concept and design of the instrument. Standing in the middle of the room and taking three measurements of area and volume is just great. A big plus that far outweighs any minus. Didn't really test for accuracy but results so far have been good for reviews and overall rating.
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