Black Receiver

 Black receivers, created and used by those who possess the Rinnegan, act as high-frequency chakrademodulators, allowing users to transmit their chakra into these receivers, and by extension, into those whom the receivers have been embedded in. Chakra can be transmitted across vast distances, though for best results the user should be nearby and at a high elevation. Black receivers disintegrate if their creator is killed or incapacitated.

 The exact source of the black receivers is unclear, having been seen produced through various means:

Origin

 * Rinnegan wielders are able to generate them from their own bodies, usually their hands.
 * Nagato's Six Paths of Pain can also generate them from their bodies.[6]
 * Madara Uchiha produced a black receiver from Hashirama's artificial body, calling it his will in physical form and telling Obito Uchiha to use it with the Six Paths Technique.
 * Black receivers have protruded from the Demonic Statue of the Outer Path's midsection at times,[8] on one occasion piercing Nagato's back and draining his life force. He was afterwards able to control the Demonic Statue.
 * Black receivers have sprouted from Obito's prosthetic limb on several occasions,   typically while his actions are being controlled by others.
 * As the Ten-Tails' jinchūriki, Obito seemingly converted his Truth-Seeking Ball into six black receivers in order to perform the Six Red Yang Formation.