No-hassle, Switch-less Voltage Doubling Truetones 1Spot TVD Voltage Doubler Cable gives you switch-free power for your pedal — and that means less noise in your signal path! This in-line transformer automatically steps the power up from 9 volts to 18 volts or from 12 volts to 24 volts. Simply connect your 9-volt or 18-volt power supply to the input on the 1Spot TVD and thats it! No switching — just clean, quiet power to your pedal and beautiful music to your ears.Truetone 1Spot TVD Features: Switch-less, worry-free power conversion for pedals (also available at GearNuts!) Clean, quiet power through flexible, easy-to-use connectors From Truetone, maker of the original one-receptacle 9-volt pedalboard power supply