Digital Meter - Various Inputs: Type - Digital Voltmeter; Inputs - DC Voltage; Supply Voltage - Nominal - 115/230VAC; Display Type - LED, Red; Display Size - 6 digit, 14.2 mm 0.56 in; Display Range - -99999 to 999999; Input Type-Range - DC Volts: +/-2.0000V, +/-20.000V, +/-200.00V, +/-300.0V; Operating Temperature - 0 to 50 deg C 32 to 122 deg F; Enclosure Material - Black Die Cast Metal Bezel, Plastic Insert Case; Enclosure Rating - NEMA 4, IEC IP65 front cover; Integrated Options - Totalizer/Integrator, Peak/Valley/Slope, Offset/E2-con; Mounting - Panel Opening HxW: 1.77 x 3.62 in 45.0 x 92.0 mm; Manufacturer Series - IMD APOLLO