Specifications:
Input Voltage: 6V~12V DC
Input Current: 2A~5A (related to voltage)
Output Voltage: About 500KV~1000KV
Input Cable Length: About 100mm/3.9"(red is positive)
Output Cable Length: About 100mm/3.9"
Arc Discharge Distance: 10mm~20mm/0.39"~0.78"
Power Supply: 3.7V lithium battery input (such as 18650 battery) battery pack, 4V or 6V lead-acid battery, etc. can be used. The input voltage and current affect the output high voltage and arc distance.（Batteries NOT INCLUDED）

Note:
Output ends of cable should be adjusted properly before power on, and the arc distance depends on battery voltage and capacity.

The arc distance should be from short to long, do not produce a longest arc at first or the module might be damaged easily.

The way to judge if a battery capacity is enough to output maximum power is to measure the battery voltage when producing arc. It the measured voltage is about 6V, then it can output maximum power. Recommended battery capacity is above 2000mA, or above 4000mA if possible.