Black Receiver

The black receivers are tools peculiar to those who awakened the Rinnegan. They're used to transmit the chakra of the user across vast distances.

Creation
The black receivers can be created through various means. Rinnegan wielders are able to generate them from their own bodies, as well as the bodies of their Six Paths of Pain. While connected to the Demonic Statue of the Outer Path via a non-sentient clone of Hashirama Senju, the elderly Madara produced receivers from the clone and claimed they were his will in physical form before telling Obito to use them with the Six Paths Technique. At times, identical receivers have protruded from the Demonic Statue's midsection. In one instance, these receivers pierced Nagato's back after he summoned the statue, draining his life force while allowing him to control it.

Black receivers have also emerged from Obito's artificial right half on several occasions, first occurring when he awakened the Mangekyō Sharingan and Wood Release, though they served no noticeable purpose and subsequently receded. Many years later, Madara attempted to control Obito by causing these receivers to emerge once more as Obito's entire right half was covered in a black substance, allowing Madara to manipulate Obito's actions using his chakra. These rods emerged from Obito's right half one final time when Black Zetsu first attached to his body and forced him to revive Madara.

As the Ten-Tails' jinchūriki, Obito seemingly converted one of his Truth-Seeking Balls into six black receivers in the process of activating the Six Red Yang Formation.

Overview
The user can generate the receivers in various shapes and sizes to fit the situation. According to Shizune, they act as high-frequency chakra demodulators, which become appreciably warm to the touch while receiving chakra. To make best use of the receivers, the user must transmit their chakra from the closest and highest point possible. The user can continuously change the frequency of the transmitted chakra signals to prevent being detected. As they are connected to their creator's chakra, the rods will disintegrate in the same manner as the Truth-Seeking Balls if their creator is killed or incapacitated.

Usage
Nagato was able to remotely control his Six Paths of Pain by implanting various receivers fashioned into piercings into their bodies. The many animals Nagato summoned through the Animal Path also had a number of these body piercings, suggesting that he may have controlled them in a similar manner. Obito later created his own Six Paths of Pain comprised entirely of reincarnated former jinchūriki, using only one receiver per body. The receivers also served to temporarily bind the chakra of the tailed beasts sealed inside the Demonic Statue of the Outer Path to their former hosts, effectively making them jinchūriki once more.

The receivers are also capable of disrupting a living individual's chakra by injecting them with the user's own chakra, hindering their movement and causing a vision of the Rinnegan to appear in their mind. By piercing the target's tenketsu with the rods, the user can entirely prevent them from moulding additional chakra. However, using the receivers in this manner can potentially backfire, as an individual with sensing capabilities can determine the user's location when pierced with the rods. Due to being immobile, Nagato fired bladed chakra receivers from his mechanical walker, which he claimed allowed him to control the victim due to their close proximity to him, though Naruto Uzumaki was able to resist his control through a combination of Sage Mode and the Nine-Tails' chakra. Those who possess the Rinnegan appear to be entirely immune to the receivers' effects.

Aside from receiving chakra, the rods can also be used to manifest chakra chains to restrain anyone who touches them with a greater binding power. Obito demonstrated a unique variation of the chakra receivers in the form of giant stakes, which he launched by forcefully ejecting them from another dimension with enough force to pierce the flesh of tailed beasts.

Other Media
In Naruto Shippūden: Shinobi Rumble, Pain has a technique called, in which he simply dashes at the opponent and stabs them with the blade variant, causing their controls to become temporarily reversed; an enhanced "Full Throttle" version is also available, called. As no specific name was given for these weapons in the manga, this may imply that they are officially known as.

Trivia

 * It was shown that the receivers inserted in the reincarnated jinchūriki moved in position when they entered Tailed Beast Mode. In the case of Rōshi transforming into Son Gokū, the receiver moved from the jinchūriki's chest up to the tailed beast's neck.