Features:One of best heating power supply module.The product includes 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.Descriptions: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.Specifications:Input voltage: 5v-12vModule dimensions: 5.5*4*2 cmCoil size: length:7.5cmwidth: 2.8cm Color: blackPackage Contents: 1 x Heating Power Supply Module Notes:The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.