LeaningTech 5V~12V Zero Voltage Switching ZVS Induction Heating Power Supply Module + Coil Power Supply Heating Power Supply Module ZVS heating power supply module including heating coil Input voltage DC5V-12V(We are not guarantee the module will work when the voltage is over 12V or less than 5V) Maximum power 120W(when 12V eddy-current heating) Ensure all the components welding right, power line connect in right way, than to set up an electric circuit. The width of the heated object is as far as possible between the 1/3~1/2 of the inner diameter of the heating coil, the maximum not more than 2/3!