(This card is never treated as a "Synchron" card.)
If there is a Synchro Monster on the field, you can Special Summon this card (from your hand). You can only Special Summon "Synchron Resonator" once per turn this way. If this card is sent from the field to the Graveyard: You can target 1 "Resonator" monster in your Graveyard, except "Synchron Resonator"; add it to your hand.