This deluxe model offers many advanced functions with the most useful being auto shut off and the sweep measuring function.  When moving the laser across the strikeband of the stone, the unit will hold the closest measurement on the display without having to press the hold button.  The display will also show you the last two distances measured and will auto store the last 30 distance measurements.  This unit also has Bluetooth connectivity to allow the operator to transfer the measurements to another device & comes with storage case.