Attention deflector

Attention deflectors are useful technology from the IDW portion of the Generation 1 continuity family.

Attention deflectors are a device that once attached to something will divert attention from that object. Unless you know the object really exists just just don't notice it.

Fiction

IDW Generation 1 continuity

Brainstorm admitted to Rung that the handle in his Briefcase contained an attention deflector. House of Ambus

When it was revealed that Minimus Ambus had been hidden inside the armor known as Ultra Magnus, Rodimus concluded that the armor must have contained a hundred microscopic attention deflectors in order to prevent Ratchet from seeing the real Minimus.The Divided Self

Later Ratchet confessed to Minimus that he had always known Minimus' secret. When probed further Ratchet remarked that attention deflectors "work for all of five seconds" and that he was insulted that Minumus thought he'd be fooled. The Sound of Breaking Glass