SMAKN&reg; Mini 3 Wires 0.36" BLUE LED Digital Volt Voltage Panel Meter Voltmeter 0-100v(99.9), Three-wires 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