Item Name: DC5V-12V to 170V 150V-220V Glow Tube High Voltage Boost DC Power Module F/ Nixie. Product DescriptionFeatures:This boost module adopts MAX1771 scheme, the boost is stable, and it can easily drive multiple glow tubes. It has low heat generation, small size, with shutdown function. The SHDN pin can be pulled high through the MCU to turn off the boost module. The output voltage is adjustable from 150V-220V.Package include:Voltage Module *1