Whoa, this is for the serious hobbyists or science fans. This is a high-voltage boost module—you feed it a low DC voltage (like 3 to 6 volts from a battery) and it kicks it up to around 400,000 volts. Yeah, that's high. It works on the Tesla coil principle and can create arcs of about 10-20mm. It comes as a pair. You need to be VERY careful with this thing. Don't run it without a load (no-load operation can damage it), don't run it continuously for more than a minute, and never short the output. You'll need a decent battery (like a 3.7V lithium or a couple in series) that can supply enough current. The red wire is positive. It's for experiments, demonstrations, or specific projects—definitely not a toy. If you know what you're doing and need a compact high-voltage source, this is it. Just please, be safe and read the notes carefully.
