This effect can be used during either player's turn. When your opponent activates a Trap Card, Tribute this face-up card to negate the activation of the Trap Card and destroy it.
Rulings
Individual Card FAQs
This monster's effect is a Multi-Trigger (Spell Speed 2) effect.
As long as "A-Team: Trap Disposal Unit" is not participating in the battle (not attacking or being attacked), you can activate its effect during the Damage Step.
FIRE|
Level 2|[ Machine / Effect ]
ATK 300|
DEF 400