Vktech Portable Digital Voltmeter DC0-100V LED Panel Voltage Meter (Green) Measuring range: DC0-100V Screw specification: M2.0x12 Self-tapping screw (not included) Display way: 3 digits 0.36 LED nixie tube Dimension: 23*15*10mm(without mounting plate) Working temperature -10 Celsius degree ~ 65 Celsius degree