my two arrived today
no chance yet, to test one
i got them mainly as 'just in case' to have them available
3 digit display, the second far right decimal point IS the Negative flow -minus amps indicator
there is a tiny push button on the back side that lets you select the mode you want
amps, volts, or alternating between the two , showing you each one
there is a simple but complete instruction set with wiring diagram
the sensor plugs in, and there is a cable for extending sensor distance from the display
the display is physically smaller than the other meters, but the digits look just as large, just less plastic case housing a smaller circuit board
will have a better idea when i test it
pictures coming soon