If this card is sent to the Graveyard as a Synchro Material: You can add 1 "Junk" monster from your Deck to your hand. If this card is in your Graveyard: You can send 1 card from your hand to the Graveyard; Special Summon this card, but banish it when it leaves the field. You can only use 1 "Jet Synchron" effect per turn, and only once that turn.