Digital Meter - Various Inputs: Type - Digital Voltmeter; Inputs - DC Voltage; Supply Voltage - Nominal - 3-6VDC; Display Type - LCD, Reflective; Display Size - 3 1/2 digit, 10.2 mm 0.4 in; Input Type-Range - DC Volts: 0 to +/-199.9 mV; Operating Temperature - 0 to 70 deg C 32 to 158 deg F; Enclosure Material - Black Plastic Bezel and Case; Mounting - Panel Opening HxW: 0.93 x 1.68 in 23.6 x 42.6 mm; Manufacturer Series - MDMV