NEW IN THE BOX, MODEL HHM-101 VOLTAGE-FREQUENCY-POLARITY INDICATOR .  THIS UNIT WILL INDICATE THE PRESENCE OF NOMINAL VOLTAGES OF 28, 115, 220, 440, V. Ac. -28,115,250,500, V. Dc., OR THE PRESENCE OF ANY VOLTAGE BETWEEN 25 AND 600 VOLTS AC OR DC. FREQUENCIES OF 60 AND 400 HERTZ, AND POLARITIES (DC-) & (-DC).  POLARITY AND FREQUENCIES DO NOT INDICATE BELOW 90 VOLTS. INSTRUCTION SHEET INCLUDED IN BOX.