Battery charge volt gauge for the HMMWV. P/N 12338472, 5568666, VG0089. NSN 6625011806542. Gauge is for use with 24-28 volt systems. Actual indicating range is 19 - 32 volts. Tic mark in green square at 27.6 volts. Includes mounting hardware. Factory original part, made in USA.
Note- do not connect a wire to the threaded stud marked "send".