Universal Adapter is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Universal Adapter is Unlimited.
YGOPRODeck lists Universal Adapter for these formats: Common Charity, TCG, OCG, Master Duel.
A listed print of Universal Adapter appears in 2019 Gold Sarcophagus Tin Mega Pack (MP19-EN134) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Universal Adapter is about $0.05 on TCGPlayer (prices change frequently).
