The input voltage of the arc generator is dc 3.7-6V and output dc 20000v high voltage, input wiring: red - positive; green - negative; output wiring: the other side same color cable. The high-voltage module is made by using the coil principle, and outputs high-voltage pulse high-voltage current, small volume, high efficiency, simple peripheral circuit (just need to connect the switch, the battery can be) the discharge intensity is . Commonly used as high voltage generator, high voltage Igniter; perfect for students to study electrical experiment, do science experiment, etc. color: Black material: plastic Package Contents: 6 x 20 kv high pressure igniter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.