Portable shockman

A portable shockman is Walkman-like device made by Elsa Frankenteen, who charges it by absorbing lightning through the bolts beside her neck and into the earplugs.

Scooby-Doo and the Ghoul School
She made it for her father when he came to visit her at Miss Grimwood's Finishing School for Ghouls.

Appearances

 * Scooby-Doo and the Ghoul School