Extendable Ears are a product invented by Fred and George Weasley. The flesh-coloured Ears are useful for eavesdropping on private conversations.

From the Story

Harry Potter and the Order of the Phoenix

Discovered in chapter 4, Number Twelve, Grimmauld Place

Although Extendable Ears can hear through doors, they are rendered useless against an Imperturbable Charm.

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