Please be kindly noted，the listed product is produced and distributed abroad and subject to the laws of its country of origin。    Features:  This is a simple flyback drive circuit that used to drive ignition coil.  The driving circuit adopts high quality components that features of large power, low heat, and high reliability.  Input 12-24V DC, can use the switching power supply, lead battery or lithium battery pack for power supply, can also use the transformer after rectification filtering for power supply, filter capacitor is not less than 10000uF.  Double panel circuit board use the whole back as the resonant circuit wiring, which has small resistance, produce less heat, and has good heat dissipation than single sided board.  Widely used to drive spark gap replacement for Tesla coil (SGTC), Jacob ladder, Marx generator and other devices.    Specifications:  Material: PCB  Voltage: DC12~24V  Weight: 330g / 11.64oz  Package Size: 11 * 5.5 * 4cm / 4.33 * 2.17 * 1.57in    Packing List:  1 * Coil Driver Board  1 * Ignition Coil