EI AC BUS Volt & Frequency Gauge 2-1/4 NON TSO

AC BUS VOLTAGE & FREQUENCY, TSOd/PMAd (no STCs). The -60 instrument is for a 60 Hz. bus and the -400 instrument is for a 400 Hz. bus. Accurate Digital Display can be switched between Voltage and Frequency, displays in Volts and Hz. 2 1/4 Mount, 3.65 Depth, 10 Oz. Instrument.