Check generator & alternator charging.
No sender required. Range: 6-16 VDC
Made in USA
Nice looking instrument, but its calibration left a lot to be desired. Non-linear, but Ive been able to adjust it to be fairly accurate in the Green Zone. Luckily, that is/was my trade. Otherwise I would be returning it.
WESTACH 2-1/4" SQUARE VOLTMETER 6-16VDC 2A5 NON TSO
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No, internal lighting is not available.
No, this is not FAA TSO approved