ITEM NAME:15KV High Voltage Generator Module Arc Ignition Inverter Step Up Boost Coil BX Feature This product adapts to 12V, but it needs adding base feedback resistor to 150 ohm-1.5K ohm; its resistance should be adjusted from high to low but cannot be too low, or it will burn triode or the product; it also cannot be too high, or it will influence output effect or make triode overheating in non-operation state (15kV is max output, and limit output shouldn't be over 15kV, that is 1.5cm arc, or it will destroy the product) Specifications: Size: 1.4x1.4x0.7cm/0.55x0.55x0.28" Quantity: 1 Pc Note: Please allow 0-3mm error due to manual measurement..Due to the difference between different monitors, the picture may not reflect the actual color of the item.