Wattjustment is a Equip Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Wattjustment is Unlimited.
YGOPRODeck lists Wattjustment for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
Wattjustment belongs to the Watt archetype—use that tag when searching for engine pieces and tech options.
A listed print of Wattjustment appears in Battle Pack 3: Monster League (BP03-EN170) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Wattjustment is about $0.08 on Cardmarket (prices change frequently).
