Turn-off Function: Through MCU, its SHDN pins will be pulled high to turn it off.Adjsutable Output Voltage: 150V-220V.MAX1771 program.The package includes:Acxico 1 Pcs Nixie Tube Power Supply Boost Module 12V to 150-220V MAX1771 for SZ3-1 QS30-1 We are very grateful for all customers' opinions to improve sales, if you are not satisfied, please contact us to find the best solutionOutput Voltage: DC 150V-280V/15mA (Adjustment)DC 6.3V/1500mA.Input Voltage: DC 9V-12V.Module output DC 250V and 6.3V voltage is suitable for anode power supply such as glow tube, cat's eye tube.The package includes:Acxico 1 Pcs Acxico High Voltage DC Converter Nixie&Magic Eye Tube HV Power Supply Module 250V/6.3VWe are very grateful for all customers' opinions to improve sales, if you are not satisfied, please contact us to find the best solution