2pcs High Voltage Generator DC 3v-6v to 400kV Boost Step-up Power Module Transformer

Very potent. Works as advertised

i made something amazing with these and theyre fantastic

These work perfectly. At 5V they draw about 1-2A and will arc about 1-1.25”. That suggests that they are more like 200,000V, but still loud and very cool. Trivially easy to use and wire up. Cannot speak to durability, but so far, they haven’t fried.

Running off a 3.7V Lion and tested the output voltage with a meter specifically designed for high voltages (electric cattle fences). Doesn't come anywhere near 400,000. It could barely reach 4000. So yeah, not quite as advertised.

So me and a buddy are enrolled in an electrician course, and we might👀 have used these and some 9v batteries to build a taser (don’t worry we knew what we were doing). I will say that these things are really strong, we ran WAY too much current through them and they’re still working fine. It was a great project, super fun, and honestly made us jump when we first started it up.