Looks like it does the same thing meter match does. Add a second 7805 in there so it will power a second gauge. My only complaint about the meter match is you still have to hack in another 7805 to power the temp sending unit.
This unit has a total of 9 calibration points, Starting as Empty as 0, 1 = 1/8, 2 = 1/4, 3 = 3/8, 4 = 1/2, 5 = 5/8, 6 = 3/4, 7 = 7/8, and 8 = Full.
If you want to count the Low Fuel and Alarm Fuel used for a in dash warning LED, it has 11 set points
With this unit you still use the Factory Voltage Limiter, it does Not provide power to the gauge.