2 Packs DC 3V - 6V to 400kV (40000V) Boost Power Module, High-Voltage Generator

Do you want to build a zapper from discrete components for the learning experience, or do you just want something plug and play? HF bug zappers (tennis racket style, they use 2 D cells but are happy with a single lithium cell) are excellent for repurposing and cost $5-$8. Amazon also has a ton of cheap HV things, some that are plug and play (black cylindrical or cube packages with in/out leads - these are more 'tazery' than bug zappery) Link - https://a.co/d/03ZIylMl And these boards that are nearly identical to those found in HF zappers. Probably more cost effective to buy HF though. Link - https://a.co/d/0dDnoxB2 Then these things that you solder together, Electroboom had a fun video on them. More of the electric lighter flavor. Link - https://a.co/d/0hksAPwI Happy zapping!