120 Volt is a passive item.
- Whenever an enemy is shot, it will zap other enemies near them, dealing damage.
- Enemies that are zapped can also zap nearby enemies.
- The zaps transfer tear effects.
- Lodestone - The magnetizing effect is spread via 120 Volt, resulting in a dense mass of enemies that further attracts the players' shots.
- Brimstone - The laser turns light blue and zaps enemies.
- Technology - The laser turns blue and creates arcs to other enemies.
- The Community Remix mod has a 'Box of Wires' item which makes Isaac shoot electricity tears, probably an inspiration for this item as its pickup quote is "Zap zap!"
- In Repentance, this item was reworked to instead rapidly zap enemies near Isaac. Its Antibirth effect was partially moved to the existing item Jacob's Ladder.
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