A Hardon billboard in San Andreas.
Hardon is an electrical company featured in Grand Theft Auto: San Andreas. It has a warehouse located in LVA Freight Depot, Las Venturas, San Andreas. Its slogan is "Plug it in and enjoy".
The company name is a reference to hard on, meaning an erect male genitalia. Its slogan is also a crude reference to sexual intercourse.
It's name is also a parody of the company harman/kardon, referencing the non-driver required "plug and play" feature.